1+y+y=9

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Solution for 1+y+y=9 equation: 


Simplifying
1 + y + y = 9

Combine like terms: y + y = 2y
1 + 2y = 9

Solving
1 + 2y = 9

Solving for variable 'y'.

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

Add '-1' to each side of the equation.
1 + -1 + 2y = 9 + -1

Combine like terms: 1 + -1 = 0
0 + 2y = 9 + -1
2y = 9 + -1

Combine like terms: 9 + -1 = 8
2y = 8

Divide each side by '2'.
y = 4

Simplifying
y = 4

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