9=y+2(4y-5)

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Solution for 9=y+2(4y-5) equation:


Simplifying
9 = y + 2(4y + -5)

Reorder the terms:
9 = y + 2(-5 + 4y)
9 = y + (-5 * 2 + 4y * 2)
9 = y + (-10 + 8y)

Reorder the terms:
9 = -10 + y + 8y

Combine like terms: y + 8y = 9y
9 = -10 + 9y

Solving
9 = -10 + 9y

Solving for variable 'y'.

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

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

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

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

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

Combine like terms: -10 + -9 = -19
-9y = -19

Divide each side by '-9'.
y = 2.111111111

Simplifying
y = 2.111111111

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