31-19=4(x-1)

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Solution for 31-19=4(x-1) equation: 


Simplifying
31 + -19 = 4(x + -1)

Combine like terms: 31 + -19 = 12
12 = 4(x + -1)

Reorder the terms:
12 = 4(-1 + x)
12 = (-1 * 4 + x * 4)
12 = (-4 + 4x)

Solving
12 = -4 + 4x

Solving for variable 'x'.

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

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

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

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

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

Combine like terms: -4 + -12 = -16
-4x = -16

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

Simplifying
x = 4

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