Basic Math Examples

$42 = y + 100 - 42$

Step 1

Rewrite the equation as $y + 100 - 42 = 42$ .

$y + 100 - 42 = 42$

Step 2

Subtract $42$ from $100$ .

$y + 58 = 42$

Step 3

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

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Step 3.1

Subtract $58$ from both sides of the equation.

$y = 42 - 58$

Step 3.2

Subtract $58$ from $42$ .

$y = - 16$