6x+30=15x-78

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Solution for 6x+30=15x-78 equation:


Simplifying
6x + 30 = 15x + -78

Reorder the terms:
30 + 6x = 15x + -78

Reorder the terms:
30 + 6x = -78 + 15x

Solving
30 + 6x = -78 + 15x

Solving for variable 'x'.

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

Add '-15x' to each side of the equation.
30 + 6x + -15x = -78 + 15x + -15x

Combine like terms: 6x + -15x = -9x
30 + -9x = -78 + 15x + -15x

Combine like terms: 15x + -15x = 0
30 + -9x = -78 + 0
30 + -9x = -78

Add '-30' to each side of the equation.
30 + -30 + -9x = -78 + -30

Combine like terms: 30 + -30 = 0
0 + -9x = -78 + -30
-9x = -78 + -30

Combine like terms: -78 + -30 = -108
-9x = -108

Divide each side by '-9'.
x = 12

Simplifying
x = 12

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