20=-10y+4(-10y+15)

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Solution for 20=-10y+4(-10y+15) equation:


Simplifying
20 = -10y + 4(-10y + 15)

Reorder the terms:
20 = -10y + 4(15 + -10y)
20 = -10y + (15 * 4 + -10y * 4)
20 = -10y + (60 + -40y)

Reorder the terms:
20 = 60 + -10y + -40y

Combine like terms: -10y + -40y = -50y
20 = 60 + -50y

Solving
20 = 60 + -50y

Solving for variable 'y'.

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

Add '50y' to each side of the equation.
20 + 50y = 60 + -50y + 50y

Combine like terms: -50y + 50y = 0
20 + 50y = 60 + 0
20 + 50y = 60

Add '-20' to each side of the equation.
20 + -20 + 50y = 60 + -20

Combine like terms: 20 + -20 = 0
0 + 50y = 60 + -20
50y = 60 + -20

Combine like terms: 60 + -20 = 40
50y = 40

Divide each side by '50'.
y = 0.8

Simplifying
y = 0.8

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