4x-8=5+7

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Solution for 4x-8=5+7 equation: 


Simplifying
4x + -8 = 5 + 7

Reorder the terms:
-8 + 4x = 5 + 7

Combine like terms: 5 + 7 = 12
-8 + 4x = 12

Solving
-8 + 4x = 12

Solving for variable 'x'.

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

Add '8' to each side of the equation.
-8 + 8 + 4x = 12 + 8

Combine like terms: -8 + 8 = 0
0 + 4x = 12 + 8
4x = 12 + 8

Combine like terms: 12 + 8 = 20
4x = 20

Divide each side by '4'.
x = 5

Simplifying
x = 5

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