-(4-y)=7(3-7y)

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


Simplifying
-1(4 + -1y) = 7(3 + -7y)
(4 * -1 + -1y * -1) = 7(3 + -7y)
(-4 + 1y) = 7(3 + -7y)
-4 + 1y = (3 * 7 + -7y * 7)
-4 + 1y = (21 + -49y)

Solving
-4 + 1y = 21 + -49y

Solving for variable 'y'.

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

Add '49y' to each side of the equation.
-4 + 1y + 49y = 21 + -49y + 49y

Combine like terms: 1y + 49y = 50y
-4 + 50y = 21 + -49y + 49y

Combine like terms: -49y + 49y = 0
-4 + 50y = 21 + 0
-4 + 50y = 21

Add '4' to each side of the equation.
-4 + 4 + 50y = 21 + 4

Combine like terms: -4 + 4 = 0
0 + 50y = 21 + 4
50y = 21 + 4

Combine like terms: 21 + 4 = 25
50y = 25

Divide each side by '50'.
y = 0.5

Simplifying
y = 0.5

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