-9*90-10y=90

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Solution for -9*90-10y=90 equation: 


Simplifying
-9 * 90 + -10y = 90

Multiply -9 * 90
-810 + -10y = 90

Solving
-810 + -10y = 90

Solving for variable 'y'.

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

Add '810' to each side of the equation.
-810 + 810 + -10y = 90 + 810

Combine like terms: -810 + 810 = 0
0 + -10y = 90 + 810
-10y = 90 + 810

Combine like terms: 90 + 810 = 900
-10y = 900

Divide each side by '-10'.
y = -90

Simplifying
y = -90

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