20y-10=18y-9

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Solution for 20y-10=18y-9 equation:


Simplifying
20y + -10 = 18y + -9

Reorder the terms:
-10 + 20y = 18y + -9

Reorder the terms:
-10 + 20y = -9 + 18y

Solving
-10 + 20y = -9 + 18y

Solving for variable 'y'.

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

Add '-18y' to each side of the equation.
-10 + 20y + -18y = -9 + 18y + -18y

Combine like terms: 20y + -18y = 2y
-10 + 2y = -9 + 18y + -18y

Combine like terms: 18y + -18y = 0
-10 + 2y = -9 + 0
-10 + 2y = -9

Add '10' to each side of the equation.
-10 + 10 + 2y = -9 + 10

Combine like terms: -10 + 10 = 0
0 + 2y = -9 + 10
2y = -9 + 10

Combine like terms: -9 + 10 = 1
2y = 1

Divide each side by '2'.
y = 0.5

Simplifying
y = 0.5

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