3(10+7y)=4(5-y)

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Solution for 3(10+7y)=4(5-y) equation:


Simplifying
3(10 + 7y) = 4(5 + -1y)
(10 * 3 + 7y * 3) = 4(5 + -1y)
(30 + 21y) = 4(5 + -1y)
30 + 21y = (5 * 4 + -1y * 4)
30 + 21y = (20 + -4y)

Solving
30 + 21y = 20 + -4y

Solving for variable 'y'.

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

Add '4y' to each side of the equation.
30 + 21y + 4y = 20 + -4y + 4y

Combine like terms: 21y + 4y = 25y
30 + 25y = 20 + -4y + 4y

Combine like terms: -4y + 4y = 0
30 + 25y = 20 + 0
30 + 25y = 20

Add '-30' to each side of the equation.
30 + -30 + 25y = 20 + -30

Combine like terms: 30 + -30 = 0
0 + 25y = 20 + -30
25y = 20 + -30

Combine like terms: 20 + -30 = -10
25y = -10

Divide each side by '25'.
y = -0.4

Simplifying
y = -0.4

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