18-0.5(y-9)=0.7(10y-9)

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Solution for 18-0.5(y-9)=0.7(10y-9) equation:


Simplifying
18 + -0.5(y + -9) = 0.7(10y + -9)

Reorder the terms:
18 + -0.5(-9 + y) = 0.7(10y + -9)
18 + (-9 * -0.5 + y * -0.5) = 0.7(10y + -9)
18 + (4.5 + -0.5y) = 0.7(10y + -9)

Combine like terms: 18 + 4.5 = 22.5
22.5 + -0.5y = 0.7(10y + -9)

Reorder the terms:
22.5 + -0.5y = 0.7(-9 + 10y)
22.5 + -0.5y = (-9 * 0.7 + 10y * 0.7)
22.5 + -0.5y = (-6.3 + 7y)

Solving
22.5 + -0.5y = -6.3 + 7y

Solving for variable 'y'.

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

Add '-7y' to each side of the equation.
22.5 + -0.5y + -7y = -6.3 + 7y + -7y

Combine like terms: -0.5y + -7y = -7.5y
22.5 + -7.5y = -6.3 + 7y + -7y

Combine like terms: 7y + -7y = 0
22.5 + -7.5y = -6.3 + 0
22.5 + -7.5y = -6.3

Add '-22.5' to each side of the equation.
22.5 + -22.5 + -7.5y = -6.3 + -22.5

Combine like terms: 22.5 + -22.5 = 0.0
0.0 + -7.5y = -6.3 + -22.5
-7.5y = -6.3 + -22.5

Combine like terms: -6.3 + -22.5 = -28.8
-7.5y = -28.8

Divide each side by '-7.5'.
y = 3.84

Simplifying
y = 3.84

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