81-y+6y+4+8y-18=180

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Solution for 81-y+6y+4+8y-18=180 equation: 


Simplifying
81 + -1y + 6y + 4 + 8y + -18 = 180

Reorder the terms:
81 + 4 + -18 + -1y + 6y + 8y = 180

Combine like terms: 81 + 4 = 85
85 + -18 + -1y + 6y + 8y = 180

Combine like terms: 85 + -18 = 67
67 + -1y + 6y + 8y = 180

Combine like terms: -1y + 6y = 5y
67 + 5y + 8y = 180

Combine like terms: 5y + 8y = 13y
67 + 13y = 180

Solving
67 + 13y = 180

Solving for variable 'y'.

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

Add '-67' to each side of the equation.
67 + -67 + 13y = 180 + -67

Combine like terms: 67 + -67 = 0
0 + 13y = 180 + -67
13y = 180 + -67

Combine like terms: 180 + -67 = 113
13y = 113

Divide each side by '13'.
y = 8.692307692

Simplifying
y = 8.692307692

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