3x-4+8x=84

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Solution for 3x-4+8x=84 equation:


Simplifying
3x + -4 + 8x = 84

Reorder the terms:
-4 + 3x + 8x = 84

Combine like terms: 3x + 8x = 11x
-4 + 11x = 84

Solving
-4 + 11x = 84

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + 11x = 84 + 4

Combine like terms: -4 + 4 = 0
0 + 11x = 84 + 4
11x = 84 + 4

Combine like terms: 84 + 4 = 88
11x = 88

Divide each side by '11'.
x = 8

Simplifying
x = 8

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