25+9y-7+12y=81

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Solution for 25+9y-7+12y=81 equation:


Simplifying
25 + 9y + -7 + 12y = 81

Reorder the terms:
25 + -7 + 9y + 12y = 81

Combine like terms: 25 + -7 = 18
18 + 9y + 12y = 81

Combine like terms: 9y + 12y = 21y
18 + 21y = 81

Solving
18 + 21y = 81

Solving for variable 'y'.

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

Add '-18' to each side of the equation.
18 + -18 + 21y = 81 + -18

Combine like terms: 18 + -18 = 0
0 + 21y = 81 + -18
21y = 81 + -18

Combine like terms: 81 + -18 = 63
21y = 63

Divide each side by '21'.
y = 3

Simplifying
y = 3

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