84=3x+7x+4

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Solution for 84=3x+7x+4 equation:


Simplifying
84 = 3x + 7x + 4

Reorder the terms:
84 = 4 + 3x + 7x

Combine like terms: 3x + 7x = 10x
84 = 4 + 10x

Solving
84 = 4 + 10x

Solving for variable 'x'.

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

Add '-10x' to each side of the equation.
84 + -10x = 4 + 10x + -10x

Combine like terms: 10x + -10x = 0
84 + -10x = 4 + 0
84 + -10x = 4

Add '-84' to each side of the equation.
84 + -84 + -10x = 4 + -84

Combine like terms: 84 + -84 = 0
0 + -10x = 4 + -84
-10x = 4 + -84

Combine like terms: 4 + -84 = -80
-10x = -80

Divide each side by '-10'.
x = 8

Simplifying
x = 8

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