30(20-y)+10y=400

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Solution for 30(20-y)+10y=400 equation:


Simplifying
30(20 + -1y) + 10y = 400
(20 * 30 + -1y * 30) + 10y = 400
(600 + -30y) + 10y = 400

Combine like terms: -30y + 10y = -20y
600 + -20y = 400

Solving
600 + -20y = 400

Solving for variable 'y'.

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

Add '-600' to each side of the equation.
600 + -600 + -20y = 400 + -600

Combine like terms: 600 + -600 = 0
0 + -20y = 400 + -600
-20y = 400 + -600

Combine like terms: 400 + -600 = -200
-20y = -200

Divide each side by '-20'.
y = 10

Simplifying
y = 10

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