y+(y-3)=90

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Solution for y+(y-3)=90 equation:


Simplifying
y + (y + -3) = 90

Reorder the terms:
y + (-3 + y) = 90

Remove parenthesis around (-3 + y)
y + -3 + y = 90

Reorder the terms:
-3 + y + y = 90

Combine like terms: y + y = 2y
-3 + 2y = 90

Solving
-3 + 2y = 90

Solving for variable 'y'.

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

Add '3' to each side of the equation.
-3 + 3 + 2y = 90 + 3

Combine like terms: -3 + 3 = 0
0 + 2y = 90 + 3
2y = 90 + 3

Combine like terms: 90 + 3 = 93
2y = 93

Divide each side by '2'.
y = 46.5

Simplifying
y = 46.5

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