90+y+(y+30)=180

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Solution for 90+y+(y+30)=180 equation: 


Simplifying
90 + y + (y + 30) = 180

Reorder the terms:
90 + y + (30 + y) = 180

Remove parenthesis around (30 + y)
90 + y + 30 + y = 180

Reorder the terms:
90 + 30 + y + y = 180

Combine like terms: 90 + 30 = 120
120 + y + y = 180

Combine like terms: y + y = 2y
120 + 2y = 180

Solving
120 + 2y = 180

Solving for variable 'y'.

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

Add '-120' to each side of the equation.
120 + -120 + 2y = 180 + -120

Combine like terms: 120 + -120 = 0
0 + 2y = 180 + -120
2y = 180 + -120

Combine like terms: 180 + -120 = 60
2y = 60

Divide each side by '2'.
y = 30

Simplifying
y = 30

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