84=3x+5+6x+7

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Solution for 84=3x+5+6x+7 equation:


Simplifying
84 = 3x + 5 + 6x + 7

Reorder the terms:
84 = 5 + 7 + 3x + 6x

Combine like terms: 5 + 7 = 12
84 = 12 + 3x + 6x

Combine like terms: 3x + 6x = 9x
84 = 12 + 9x

Solving
84 = 12 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
84 + -9x = 12 + 9x + -9x

Combine like terms: 9x + -9x = 0
84 + -9x = 12 + 0
84 + -9x = 12

Add '-84' to each side of the equation.
84 + -84 + -9x = 12 + -84

Combine like terms: 84 + -84 = 0
0 + -9x = 12 + -84
-9x = 12 + -84

Combine like terms: 12 + -84 = -72
-9x = -72

Divide each side by '-9'.
x = 8

Simplifying
x = 8

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