87=-3(y-7)

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Solution for 87=-3(y-7) equation:


Simplifying
87 = -3(y + -7)

Reorder the terms:
87 = -3(-7 + y)
87 = (-7 * -3 + y * -3)
87 = (21 + -3y)

Solving
87 = 21 + -3y

Solving for variable 'y'.

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

Add '3y' to each side of the equation.
87 + 3y = 21 + -3y + 3y

Combine like terms: -3y + 3y = 0
87 + 3y = 21 + 0
87 + 3y = 21

Add '-87' to each side of the equation.
87 + -87 + 3y = 21 + -87

Combine like terms: 87 + -87 = 0
0 + 3y = 21 + -87
3y = 21 + -87

Combine like terms: 21 + -87 = -66
3y = -66

Divide each side by '3'.
y = -22

Simplifying
y = -22

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