Basic Math Examples

$21 y - 20 y + 20 = - 20$

Step 1

Subtract $20 y$ from $21 y$ .

$y + 20 = - 20$

Step 2

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

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Step 2.1

Subtract $20$ from both sides of the equation.

$y = - 20 - 20$

Step 2.2

Subtract $20$ from $- 20$ .

$y = - 40$