10y-9(y-8)+5=90

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Solution for 10y-9(y-8)+5=90 equation:


Simplifying
10y + -9(y + -8) + 5 = 90

Reorder the terms:
10y + -9(-8 + y) + 5 = 90
10y + (-8 * -9 + y * -9) + 5 = 90
10y + (72 + -9y) + 5 = 90

Reorder the terms:
72 + 5 + 10y + -9y = 90

Combine like terms: 72 + 5 = 77
77 + 10y + -9y = 90

Combine like terms: 10y + -9y = 1y
77 + 1y = 90

Solving
77 + 1y = 90

Solving for variable 'y'.

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

Add '-77' to each side of the equation.
77 + -77 + 1y = 90 + -77

Combine like terms: 77 + -77 = 0
0 + 1y = 90 + -77
1y = 90 + -77

Combine like terms: 90 + -77 = 13
1y = 13

Divide each side by '1'.
y = 13

Simplifying
y = 13

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