66=3x+7x-4

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Solution for 66=3x+7x-4 equation:


Simplifying
66 = 3x + 7x + -4

Reorder the terms:
66 = -4 + 3x + 7x

Combine like terms: 3x + 7x = 10x
66 = -4 + 10x

Solving
66 = -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.
66 + -10x = -4 + 10x + -10x

Combine like terms: 10x + -10x = 0
66 + -10x = -4 + 0
66 + -10x = -4

Add '-66' to each side of the equation.
66 + -66 + -10x = -4 + -66

Combine like terms: 66 + -66 = 0
0 + -10x = -4 + -66
-10x = -4 + -66

Combine like terms: -4 + -66 = -70
-10x = -70

Divide each side by '-10'.
x = 7

Simplifying
x = 7

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