-9y+13=20-7y

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Solution for -9y+13=20-7y equation:


Simplifying
-9y + 13 = 20 + -7y

Reorder the terms:
13 + -9y = 20 + -7y

Solving
13 + -9y = 20 + -7y

Solving for variable 'y'.

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

Add '7y' to each side of the equation.
13 + -9y + 7y = 20 + -7y + 7y

Combine like terms: -9y + 7y = -2y
13 + -2y = 20 + -7y + 7y

Combine like terms: -7y + 7y = 0
13 + -2y = 20 + 0
13 + -2y = 20

Add '-13' to each side of the equation.
13 + -13 + -2y = 20 + -13

Combine like terms: 13 + -13 = 0
0 + -2y = 20 + -13
-2y = 20 + -13

Combine like terms: 20 + -13 = 7
-2y = 7

Divide each side by '-2'.
y = -3.5

Simplifying
y = -3.5

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