3(y-40)+(y-20)=180

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Solution for 3(y-40)+(y-20)=180 equation: 


Simplifying
3(y + -40) + (y + -20) = 180

Reorder the terms:
3(-40 + y) + (y + -20) = 180
(-40 * 3 + y * 3) + (y + -20) = 180
(-120 + 3y) + (y + -20) = 180

Reorder the terms:
-120 + 3y + (-20 + y) = 180

Remove parenthesis around (-20 + y)
-120 + 3y + -20 + y = 180

Reorder the terms:
-120 + -20 + 3y + y = 180

Combine like terms: -120 + -20 = -140
-140 + 3y + y = 180

Combine like terms: 3y + y = 4y
-140 + 4y = 180

Solving
-140 + 4y = 180

Solving for variable 'y'.

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

Add '140' to each side of the equation.
-140 + 140 + 4y = 180 + 140

Combine like terms: -140 + 140 = 0
0 + 4y = 180 + 140
4y = 180 + 140

Combine like terms: 180 + 140 = 320
4y = 320

Divide each side by '4'.
y = 80

Simplifying
y = 80

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