3x-4=8x+7

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Solution for 3x-4=8x+7 equation:


Simplifying
3x + -4 = 8x + 7

Reorder the terms:
-4 + 3x = 8x + 7

Reorder the terms:
-4 + 3x = 7 + 8x

Solving
-4 + 3x = 7 + 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 + 3x + -8x = 7 + 8x + -8x

Combine like terms: 3x + -8x = -5x
-4 + -5x = 7 + 8x + -8x

Combine like terms: 8x + -8x = 0
-4 + -5x = 7 + 0
-4 + -5x = 7

Add '4' to each side of the equation.
-4 + 4 + -5x = 7 + 4

Combine like terms: -4 + 4 = 0
0 + -5x = 7 + 4
-5x = 7 + 4

Combine like terms: 7 + 4 = 11
-5x = 11

Divide each side by '-5'.
x = -2.2

Simplifying
x = -2.2

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