y+(y+9)=91

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Solution for y+(y+9)=91 equation:


Simplifying
y + (y + 9) = 91

Reorder the terms:
y + (9 + y) = 91

Remove parenthesis around (9 + y)
y + 9 + y = 91

Reorder the terms:
9 + y + y = 91

Combine like terms: y + y = 2y
9 + 2y = 91

Solving
9 + 2y = 91

Solving for variable 'y'.

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

Add '-9' to each side of the equation.
9 + -9 + 2y = 91 + -9

Combine like terms: 9 + -9 = 0
0 + 2y = 91 + -9
2y = 91 + -9

Combine like terms: 91 + -9 = 82
2y = 82

Divide each side by '2'.
y = 41

Simplifying
y = 41

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