8x-12=4x-21

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Solution for 8x-12=4x-21 equation:


Simplifying
8x + -12 = 4x + -21

Reorder the terms:
-12 + 8x = 4x + -21

Reorder the terms:
-12 + 8x = -21 + 4x

Solving
-12 + 8x = -21 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
-12 + 8x + -4x = -21 + 4x + -4x

Combine like terms: 8x + -4x = 4x
-12 + 4x = -21 + 4x + -4x

Combine like terms: 4x + -4x = 0
-12 + 4x = -21 + 0
-12 + 4x = -21

Add '12' to each side of the equation.
-12 + 12 + 4x = -21 + 12

Combine like terms: -12 + 12 = 0
0 + 4x = -21 + 12
4x = -21 + 12

Combine like terms: -21 + 12 = -9
4x = -9

Divide each side by '4'.
x = -2.25

Simplifying
x = -2.25

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