8x-21=4x+78

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Solution for 8x-21=4x+78 equation:


Simplifying
8x + -21 = 4x + 78

Reorder the terms:
-21 + 8x = 4x + 78

Reorder the terms:
-21 + 8x = 78 + 4x

Solving
-21 + 8x = 78 + 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.
-21 + 8x + -4x = 78 + 4x + -4x

Combine like terms: 8x + -4x = 4x
-21 + 4x = 78 + 4x + -4x

Combine like terms: 4x + -4x = 0
-21 + 4x = 78 + 0
-21 + 4x = 78

Add '21' to each side of the equation.
-21 + 21 + 4x = 78 + 21

Combine like terms: -21 + 21 = 0
0 + 4x = 78 + 21
4x = 78 + 21

Combine like terms: 78 + 21 = 99
4x = 99

Divide each side by '4'.
x = 24.75

Simplifying
x = 24.75

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