3(x-1)-7=15

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Solution for 3(x-1)-7=15 equation: 


Simplifying
3(x + -1) + -7 = 15

Reorder the terms:
3(-1 + x) + -7 = 15
(-1 * 3 + x * 3) + -7 = 15
(-3 + 3x) + -7 = 15

Reorder the terms:
-3 + -7 + 3x = 15

Combine like terms: -3 + -7 = -10
-10 + 3x = 15

Solving
-10 + 3x = 15

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 + 3x = 15 + 10

Combine like terms: -10 + 10 = 0
0 + 3x = 15 + 10
3x = 15 + 10

Combine like terms: 15 + 10 = 25
3x = 25

Divide each side by '3'.
x = 8.333333333

Simplifying
x = 8.333333333

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