31-19=3(x-1)

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Solution for 31-19=3(x-1) equation: 


Simplifying
31 + -19 = 3(x + -1)

Combine like terms: 31 + -19 = 12
12 = 3(x + -1)

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

Solving
12 = -3 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
12 + -3x = -3 + 3x + -3x

Combine like terms: 3x + -3x = 0
12 + -3x = -3 + 0
12 + -3x = -3

Add '-12' to each side of the equation.
12 + -12 + -3x = -3 + -12

Combine like terms: 12 + -12 = 0
0 + -3x = -3 + -12
-3x = -3 + -12

Combine like terms: -3 + -12 = -15
-3x = -15

Divide each side by '-3'.
x = 5

Simplifying
x = 5

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