13=20-9x

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Solution for 13=20-9x equation:


Simplifying
13 = 20 + -9x

Solving
13 = 20 + -9x

Solving for variable 'x'.

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

Add '9x' to each side of the equation.
13 + 9x = 20 + -9x + 9x

Combine like terms: -9x + 9x = 0
13 + 9x = 20 + 0
13 + 9x = 20

Add '-13' to each side of the equation.
13 + -13 + 9x = 20 + -13

Combine like terms: 13 + -13 = 0
0 + 9x = 20 + -13
9x = 20 + -13

Combine like terms: 20 + -13 = 7
9x = 7

Divide each side by '9'.
x = 0.7777777778

Simplifying
x = 0.7777777778

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