100-y+10=90

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Solution for 100-y+10=90 equation:


Simplifying
100 + -1y + 10 = 90

Reorder the terms:
100 + 10 + -1y = 90

Combine like terms: 100 + 10 = 110
110 + -1y = 90

Solving
110 + -1y = 90

Solving for variable 'y'.

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

Add '-110' to each side of the equation.
110 + -110 + -1y = 90 + -110

Combine like terms: 110 + -110 = 0
0 + -1y = 90 + -110
-1y = 90 + -110

Combine like terms: 90 + -110 = -20
-1y = -20

Divide each side by '-1'.
y = 20

Simplifying
y = 20

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