Pre-Algebra Examples

Find the y-intercept 6x+3y=90
Step 1
Rewrite in slope-intercept form.
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Step 1.1
The slope-intercept form is , where is the slope and is the y-intercept.
Step 1.2
Subtract from both sides of the equation.
Step 1.3
Divide each term in by and simplify.
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Step 1.3.1
Divide each term in by .
Step 1.3.2
Simplify the left side.
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Step 1.3.2.1
Cancel the common factor of .
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Step 1.3.2.1.1
Cancel the common factor.
Step 1.3.2.1.2
Divide by .
Step 1.3.3
Simplify the right side.
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Step 1.3.3.1
Simplify each term.
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Step 1.3.3.1.1
Divide by .
Step 1.3.3.1.2
Cancel the common factor of and .
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Step 1.3.3.1.2.1
Factor out of .
Step 1.3.3.1.2.2
Cancel the common factors.
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Step 1.3.3.1.2.2.1
Factor out of .
Step 1.3.3.1.2.2.2
Cancel the common factor.
Step 1.3.3.1.2.2.3
Rewrite the expression.
Step 1.3.3.1.2.2.4
Divide by .
Step 1.4
Reorder and .
Step 2
Using the slope-intercept form, the y-intercept is .
Step 3
y-intercept in point form.
Step 4