7-(8-3x)=20

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Solution for 7-(8-3x)=20 equation: 


Simplifying
7 + -1(8 + -3x) = 20
7 + (8 * -1 + -3x * -1) = 20
7 + (-8 + 3x) = 20

Combine like terms: 7 + -8 = -1
-1 + 3x = 20

Solving
-1 + 3x = 20

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 3x = 20 + 1

Combine like terms: -1 + 1 = 0
0 + 3x = 20 + 1
3x = 20 + 1

Combine like terms: 20 + 1 = 21
3x = 21

Divide each side by '3'.
x = 7

Simplifying
x = 7

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