.25(y-4)+.05y=.20y-.05(80)

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Solution for .25(y-4)+.05y=.20y-.05(80) equation:


Simplifying
0.25(y + -4) + 0.05y = 0.20y + -0.05(80)

Reorder the terms:
0.25(-4 + y) + 0.05y = 0.20y + -0.05(80)
(-4 * 0.25 + y * 0.25) + 0.05y = 0.20y + -0.05(80)
(-1 + 0.25y) + 0.05y = 0.20y + -0.05(80)

Combine like terms: 0.25y + 0.05y = 0.3y
-1 + 0.3y = 0.20y + -0.05(80)

Multiply -0.05 * 80
-1 + 0.3y = 0.20y + -4

Reorder the terms:
-1 + 0.3y = -4 + 0.20y

Solving
-1 + 0.3y = -4 + 0.20y

Solving for variable 'y'.

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

Add '-0.20y' to each side of the equation.
-1 + 0.3y + -0.20y = -4 + 0.20y + -0.20y

Combine like terms: 0.3y + -0.20y = 0.1y
-1 + 0.1y = -4 + 0.20y + -0.20y

Combine like terms: 0.20y + -0.20y = 0.00
-1 + 0.1y = -4 + 0.00
-1 + 0.1y = -4

Add '1' to each side of the equation.
-1 + 1 + 0.1y = -4 + 1

Combine like terms: -1 + 1 = 0
0 + 0.1y = -4 + 1
0.1y = -4 + 1

Combine like terms: -4 + 1 = -3
0.1y = -3

Divide each side by '0.1'.
y = -30

Simplifying
y = -30

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