3(x-1)-7(x+1)=12

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Solution for 3(x-1)-7(x+1)=12 equation:


Simplifying
3(x + -1) + -7(x + 1) = 12

Reorder the terms:
3(-1 + x) + -7(x + 1) = 12
(-1 * 3 + x * 3) + -7(x + 1) = 12
(-3 + 3x) + -7(x + 1) = 12

Reorder the terms:
-3 + 3x + -7(1 + x) = 12
-3 + 3x + (1 * -7 + x * -7) = 12
-3 + 3x + (-7 + -7x) = 12

Reorder the terms:
-3 + -7 + 3x + -7x = 12

Combine like terms: -3 + -7 = -10
-10 + 3x + -7x = 12

Combine like terms: 3x + -7x = -4x
-10 + -4x = 12

Solving
-10 + -4x = 12

Solving for variable 'x'.

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

Add '10' to each side of the equation.
-10 + 10 + -4x = 12 + 10

Combine like terms: -10 + 10 = 0
0 + -4x = 12 + 10
-4x = 12 + 10

Combine like terms: 12 + 10 = 22
-4x = 22

Divide each side by '-4'.
x = -5.5

Simplifying
x = -5.5

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