10+y+y=20

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Solution for 10+y+y=20 equation: 


Simplifying
10 + y + y = 20

Combine like terms: y + y = 2y
10 + 2y = 20

Solving
10 + 2y = 20

Solving for variable 'y'.

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

Add '-10' to each side of the equation.
10 + -10 + 2y = 20 + -10

Combine like terms: 10 + -10 = 0
0 + 2y = 20 + -10
2y = 20 + -10

Combine like terms: 20 + -10 = 10
2y = 10

Divide each side by '2'.
y = 5

Simplifying
y = 5

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