-121-9x=7x+21

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Solution for -121-9x=7x+21 equation:


Simplifying
-121 + -9x = 7x + 21

Reorder the terms:
-121 + -9x = 21 + 7x

Solving
-121 + -9x = 21 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
-121 + -9x + -7x = 21 + 7x + -7x

Combine like terms: -9x + -7x = -16x
-121 + -16x = 21 + 7x + -7x

Combine like terms: 7x + -7x = 0
-121 + -16x = 21 + 0
-121 + -16x = 21

Add '121' to each side of the equation.
-121 + 121 + -16x = 21 + 121

Combine like terms: -121 + 121 = 0
0 + -16x = 21 + 121
-16x = 21 + 121

Combine like terms: 21 + 121 = 142
-16x = 142

Divide each side by '-16'.
x = -8.875

Simplifying
x = -8.875

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