15x+40=8x-9

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Solution for 15x+40=8x-9 equation:


Simplifying
15x + 40 = 8x + -9

Reorder the terms:
40 + 15x = 8x + -9

Reorder the terms:
40 + 15x = -9 + 8x

Solving
40 + 15x = -9 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
40 + 15x + -8x = -9 + 8x + -8x

Combine like terms: 15x + -8x = 7x
40 + 7x = -9 + 8x + -8x

Combine like terms: 8x + -8x = 0
40 + 7x = -9 + 0
40 + 7x = -9

Add '-40' to each side of the equation.
40 + -40 + 7x = -9 + -40

Combine like terms: 40 + -40 = 0
0 + 7x = -9 + -40
7x = -9 + -40

Combine like terms: -9 + -40 = -49
7x = -49

Divide each side by '7'.
x = -7

Simplifying
x = -7

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