20-11=3(20-x)

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Solution for 20-11=3(20-x) equation:


Simplifying
20 + -11 = 3(20 + -1x)

Combine like terms: 20 + -11 = 9
9 = 3(20 + -1x)
9 = (20 * 3 + -1x * 3)
9 = (60 + -3x)

Solving
9 = 60 + -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.
9 + 3x = 60 + -3x + 3x

Combine like terms: -3x + 3x = 0
9 + 3x = 60 + 0
9 + 3x = 60

Add '-9' to each side of the equation.
9 + -9 + 3x = 60 + -9

Combine like terms: 9 + -9 = 0
0 + 3x = 60 + -9
3x = 60 + -9

Combine like terms: 60 + -9 = 51
3x = 51

Divide each side by '3'.
x = 17

Simplifying
x = 17

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