Basic Math Examples

Solve for r 1381.02=1250(1+r/12)^(1.33*12)
Step 1
Rewrite the equation as .
Step 2
Multiply by .
Step 3
Divide each term in by and simplify.
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Step 3.1
Divide each term in by .
Step 3.2
Simplify the left side.
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Step 3.2.1
Cancel the common factor of .
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Step 3.2.1.1
Cancel the common factor.
Step 3.2.1.2
Divide by .
Step 3.3
Simplify the right side.
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Step 3.3.1
Divide by .
Step 4
Convert the decimal exponent to a fractional exponent.
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Step 4.1
Convert the decimal number to a fraction by placing the decimal number over a power of ten. Since there are numbers to the right of the decimal point, place the decimal number over . Next, add the whole number to the left of the decimal.
Step 4.2
Reduce the fractional part of the mixed number.
Step 4.3
Convert to an improper fraction.
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Step 4.3.1
A mixed number is an addition of its whole and fractional parts.
Step 4.3.2
Add and .
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Step 4.3.2.1
To write as a fraction with a common denominator, multiply by .
Step 4.3.2.2
Combine and .
Step 4.3.2.3
Combine the numerators over the common denominator.
Step 4.3.2.4
Simplify the numerator.
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Step 4.3.2.4.1
Multiply by .
Step 4.3.2.4.2
Add and .
Step 5
Raise each side of the equation to the power of to eliminate the fractional exponent on the left side.
Step 6
Simplify the exponent.
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Step 6.1
Simplify the left side.
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Step 6.1.1
Simplify .
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Step 6.1.1.1
Multiply the exponents in .
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Step 6.1.1.1.1
Apply the power rule and multiply exponents, .
Step 6.1.1.1.2
Cancel the common factor of .
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Step 6.1.1.1.2.1
Factor out of .
Step 6.1.1.1.2.2
Cancel the common factor.
Step 6.1.1.1.2.3
Rewrite the expression.
Step 6.1.1.1.3
Divide by .
Step 6.1.1.2
Simplify.
Step 6.2
Simplify the right side.
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Step 6.2.1
Simplify .
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Step 6.2.1.1
Divide by .
Step 6.2.1.2
Raise to the power of .
Step 7
Solve for .
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Step 7.1
Move all terms not containing to the right side of the equation.
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Step 7.1.1
Subtract from both sides of the equation.
Step 7.1.2
Subtract from .
Step 7.2
Multiply both sides of the equation by .
Step 7.3
Simplify both sides of the equation.
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Step 7.3.1
Simplify the left side.
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Step 7.3.1.1
Cancel the common factor of .
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Step 7.3.1.1.1
Cancel the common factor.
Step 7.3.1.1.2
Rewrite the expression.
Step 7.3.2
Simplify the right side.
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Step 7.3.2.1
Multiply by .