Trigonometry Examples

$\frac{88 + 91 + x}{3} = 90$

Step 1

Multiply both sides of the equation by $3$ .

$3 \frac{88 + 91 + x}{3} = 3 \cdot 90$

Step 2

Simplify both sides of the equation.

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Step 2.1

Simplify the left side.

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Step 2.1.1

Simplify $3 \frac{88 + 91 + x}{3}$ .

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Step 2.1.1.1

Cancel the common factor of $3$ .

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Step 2.1.1.1.1

Cancel the common factor.

$3 \frac{88 + 91 + x}{3} = 3 \cdot 90$

Step 2.1.1.1.2

Rewrite the expression.

$88 + 91 + x = 3 \cdot 90$

Step 2.1.1.2

Add $88$ and $91$ .

$179 + x = 3 \cdot 90$

Step 2.2

Simplify the right side.

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Step 2.2.1

Multiply $3$ by $90$ .

$179 + x = 270$

Step 3

Move all terms not containing $x$ to the right side of the equation.

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Step 3.1

Subtract $179$ from both sides of the equation.

$x = 270 - 179$

Step 3.2

Subtract $179$ from $270$ .

$x = 91$