7x+4=8x-9

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Solution for 7x+4=8x-9 equation:


Simplifying
7x + 4 = 8x + -9

Reorder the terms:
4 + 7x = 8x + -9

Reorder the terms:
4 + 7x = -9 + 8x

Solving
4 + 7x = -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.
4 + 7x + -8x = -9 + 8x + -8x

Combine like terms: 7x + -8x = -1x
4 + -1x = -9 + 8x + -8x

Combine like terms: 8x + -8x = 0
4 + -1x = -9 + 0
4 + -1x = -9

Add '-4' to each side of the equation.
4 + -4 + -1x = -9 + -4

Combine like terms: 4 + -4 = 0
0 + -1x = -9 + -4
-1x = -9 + -4

Combine like terms: -9 + -4 = -13
-1x = -13

Divide each side by '-1'.
x = 13

Simplifying
x = 13

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