-21+5=8x+4-7x

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Solution for -21+5=8x+4-7x equation:


Simplifying
-21 + 5 = 8x + 4 + -7x

Combine like terms: -21 + 5 = -16
-16 = 8x + 4 + -7x

Reorder the terms:
-16 = 4 + 8x + -7x

Combine like terms: 8x + -7x = 1x
-16 = 4 + 1x

Solving
-16 = 4 + 1x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-16 + -1x = 4 + 1x + -1x

Combine like terms: 1x + -1x = 0
-16 + -1x = 4 + 0
-16 + -1x = 4

Add '16' to each side of the equation.
-16 + 16 + -1x = 4 + 16

Combine like terms: -16 + 16 = 0
0 + -1x = 4 + 16
-1x = 4 + 16

Combine like terms: 4 + 16 = 20
-1x = 20

Divide each side by '-1'.
x = -20

Simplifying
x = -20

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