10y+90=9y-30

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Solution for 10y+90=9y-30 equation:


Simplifying
10y + 90 = 9y + -30

Reorder the terms:
90 + 10y = 9y + -30

Reorder the terms:
90 + 10y = -30 + 9y

Solving
90 + 10y = -30 + 9y

Solving for variable 'y'.

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

Add '-9y' to each side of the equation.
90 + 10y + -9y = -30 + 9y + -9y

Combine like terms: 10y + -9y = 1y
90 + 1y = -30 + 9y + -9y

Combine like terms: 9y + -9y = 0
90 + 1y = -30 + 0
90 + 1y = -30

Add '-90' to each side of the equation.
90 + -90 + 1y = -30 + -90

Combine like terms: 90 + -90 = 0
0 + 1y = -30 + -90
1y = -30 + -90

Combine like terms: -30 + -90 = -120
1y = -120

Divide each side by '1'.
y = -120

Simplifying
y = -120

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