9x+21=7x-17

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Solution for 9x+21=7x-17 equation:


Simplifying
9x + 21 = 7x + -17

Reorder the terms:
21 + 9x = 7x + -17

Reorder the terms:
21 + 9x = -17 + 7x

Solving
21 + 9x = -17 + 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.
21 + 9x + -7x = -17 + 7x + -7x

Combine like terms: 9x + -7x = 2x
21 + 2x = -17 + 7x + -7x

Combine like terms: 7x + -7x = 0
21 + 2x = -17 + 0
21 + 2x = -17

Add '-21' to each side of the equation.
21 + -21 + 2x = -17 + -21

Combine like terms: 21 + -21 = 0
0 + 2x = -17 + -21
2x = -17 + -21

Combine like terms: -17 + -21 = -38
2x = -38

Divide each side by '2'.
x = -19

Simplifying
x = -19

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