(90+y)+(y-15)=387

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Solution for (90+y)+(y-15)=387 equation:


Simplifying
(90 + y) + (y + -15) = 387

Remove parenthesis around (90 + y)
90 + y + (y + -15) = 387

Reorder the terms:
90 + y + (-15 + y) = 387

Remove parenthesis around (-15 + y)
90 + y + -15 + y = 387

Reorder the terms:
90 + -15 + y + y = 387

Combine like terms: 90 + -15 = 75
75 + y + y = 387

Combine like terms: y + y = 2y
75 + 2y = 387

Solving
75 + 2y = 387

Solving for variable 'y'.

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

Add '-75' to each side of the equation.
75 + -75 + 2y = 387 + -75

Combine like terms: 75 + -75 = 0
0 + 2y = 387 + -75
2y = 387 + -75

Combine like terms: 387 + -75 = 312
2y = 312

Divide each side by '2'.
y = 156

Simplifying
y = 156

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