3(x-4)-7=20

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Solution for 3(x-4)-7=20 equation:


Simplifying
3(x + -4) + -7 = 20

Reorder the terms:
3(-4 + x) + -7 = 20
(-4 * 3 + x * 3) + -7 = 20
(-12 + 3x) + -7 = 20

Reorder the terms:
-12 + -7 + 3x = 20

Combine like terms: -12 + -7 = -19
-19 + 3x = 20

Solving
-19 + 3x = 20

Solving for variable 'x'.

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

Add '19' to each side of the equation.
-19 + 19 + 3x = 20 + 19

Combine like terms: -19 + 19 = 0
0 + 3x = 20 + 19
3x = 20 + 19

Combine like terms: 20 + 19 = 39
3x = 39

Divide each side by '3'.
x = 13

Simplifying
x = 13

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