21=7(g-87)

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Solution for 21=7(g-87) equation:


Simplifying
21 = 7(g + -87)

Reorder the terms:
21 = 7(-87 + g)
21 = (-87 * 7 + g * 7)
21 = (-609 + 7g)

Solving
21 = -609 + 7g

Solving for variable 'g'.

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

Add '-7g' to each side of the equation.
21 + -7g = -609 + 7g + -7g

Combine like terms: 7g + -7g = 0
21 + -7g = -609 + 0
21 + -7g = -609

Add '-21' to each side of the equation.
21 + -21 + -7g = -609 + -21

Combine like terms: 21 + -21 = 0
0 + -7g = -609 + -21
-7g = -609 + -21

Combine like terms: -609 + -21 = -630
-7g = -630

Divide each side by '-7'.
g = 90

Simplifying
g = 90

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