180=90+y+y-30

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Solution for 180=90+y+y-30 equation:


Simplifying
180 = 90 + y + y + -30

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

Combine like terms: 90 + -30 = 60
180 = 60 + y + y

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

Solving
180 = 60 + 2y

Solving for variable 'y'.

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

Add '-2y' to each side of the equation.
180 + -2y = 60 + 2y + -2y

Combine like terms: 2y + -2y = 0
180 + -2y = 60 + 0
180 + -2y = 60

Add '-180' to each side of the equation.
180 + -180 + -2y = 60 + -180

Combine like terms: 180 + -180 = 0
0 + -2y = 60 + -180
-2y = 60 + -180

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

Divide each side by '-2'.
y = 60

Simplifying
y = 60

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