7y-8+3y-12=13+17

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Solution for 7y-8+3y-12=13+17 equation:


Simplifying
7y + -8 + 3y + -12 = 13 + 17

Reorder the terms:
-8 + -12 + 7y + 3y = 13 + 17

Combine like terms: -8 + -12 = -20
-20 + 7y + 3y = 13 + 17

Combine like terms: 7y + 3y = 10y
-20 + 10y = 13 + 17

Combine like terms: 13 + 17 = 30
-20 + 10y = 30

Solving
-20 + 10y = 30

Solving for variable 'y'.

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

Add '20' to each side of the equation.
-20 + 20 + 10y = 30 + 20

Combine like terms: -20 + 20 = 0
0 + 10y = 30 + 20
10y = 30 + 20

Combine like terms: 30 + 20 = 50
10y = 50

Divide each side by '10'.
y = 5

Simplifying
y = 5

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