7x+21-16x+12=4-7x-3x+7

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Solution for 7x+21-16x+12=4-7x-3x+7 equation: 


Simplifying
7x + 21 + -16x + 12 = 4 + -7x + -3x + 7

Reorder the terms:
21 + 12 + 7x + -16x = 4 + -7x + -3x + 7

Combine like terms: 21 + 12 = 33
33 + 7x + -16x = 4 + -7x + -3x + 7

Combine like terms: 7x + -16x = -9x
33 + -9x = 4 + -7x + -3x + 7

Reorder the terms:
33 + -9x = 4 + 7 + -7x + -3x

Combine like terms: 4 + 7 = 11
33 + -9x = 11 + -7x + -3x

Combine like terms: -7x + -3x = -10x
33 + -9x = 11 + -10x

Solving
33 + -9x = 11 + -10x

Solving for variable 'x'.

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

Add '10x' to each side of the equation.
33 + -9x + 10x = 11 + -10x + 10x

Combine like terms: -9x + 10x = 1x
33 + 1x = 11 + -10x + 10x

Combine like terms: -10x + 10x = 0
33 + 1x = 11 + 0
33 + 1x = 11

Add '-33' to each side of the equation.
33 + -33 + 1x = 11 + -33

Combine like terms: 33 + -33 = 0
0 + 1x = 11 + -33
1x = 11 + -33

Combine like terms: 11 + -33 = -22
1x = -22

Divide each side by '1'.
x = -22

Simplifying
x = -22

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