4(30-y)+3y=100

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Solution for 4(30-y)+3y=100 equation:


Simplifying
4(30 + -1y) + 3y = 100
(30 * 4 + -1y * 4) + 3y = 100
(120 + -4y) + 3y = 100

Combine like terms: -4y + 3y = -1y
120 + -1y = 100

Solving
120 + -1y = 100

Solving for variable 'y'.

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

Add '-120' to each side of the equation.
120 + -120 + -1y = 100 + -120

Combine like terms: 120 + -120 = 0
0 + -1y = 100 + -120
-1y = 100 + -120

Combine like terms: 100 + -120 = -20
-1y = -20

Divide each side by '-1'.
y = 20

Simplifying
y = 20

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