21-y=-87+2

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Solution for 21-y=-87+2 equation: 


Simplifying
21 + -1y = -87 + 2

Combine like terms: -87 + 2 = -85
21 + -1y = -85

Solving
21 + -1y = -85

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-21' to each side of the equation.
21 + -21 + -1y = -85 + -21

Combine like terms: 21 + -21 = 0
0 + -1y = -85 + -21
-1y = -85 + -21

Combine like terms: -85 + -21 = -106
-1y = -106

Divide each side by '-1'.
y = 106

Simplifying
y = 106

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