8(y-4)+5(y+1)=90

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Solution for 8(y-4)+5(y+1)=90 equation:


Simplifying
8(y + -4) + 5(y + 1) = 90

Reorder the terms:
8(-4 + y) + 5(y + 1) = 90
(-4 * 8 + y * 8) + 5(y + 1) = 90
(-32 + 8y) + 5(y + 1) = 90

Reorder the terms:
-32 + 8y + 5(1 + y) = 90
-32 + 8y + (1 * 5 + y * 5) = 90
-32 + 8y + (5 + 5y) = 90

Reorder the terms:
-32 + 5 + 8y + 5y = 90

Combine like terms: -32 + 5 = -27
-27 + 8y + 5y = 90

Combine like terms: 8y + 5y = 13y
-27 + 13y = 90

Solving
-27 + 13y = 90

Solving for variable 'y'.

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

Add '27' to each side of the equation.
-27 + 27 + 13y = 90 + 27

Combine like terms: -27 + 27 = 0
0 + 13y = 90 + 27
13y = 90 + 27

Combine like terms: 90 + 27 = 117
13y = 117

Divide each side by '13'.
y = 9

Simplifying
y = 9

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