21y-20y=17+8

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Solution for 21y-20y=17+8 equation: 


Simplifying
21y + -20y = 17 + 8

Combine like terms: 21y + -20y = 1y
1y = 17 + 8

Combine like terms: 17 + 8 = 25
1y = 25

Solving
1y = 25

Solving for variable 'y'.

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

Divide each side by '1'.
y = 25

Simplifying
y = 25

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