5(-4y+7)-8y=21

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Solution for 5(-4y+7)-8y=21 equation:


Simplifying
5(-4y + 7) + -8y = 21

Reorder the terms:
5(7 + -4y) + -8y = 21
(7 * 5 + -4y * 5) + -8y = 21
(35 + -20y) + -8y = 21

Combine like terms: -20y + -8y = -28y
35 + -28y = 21

Solving
35 + -28y = 21

Solving for variable 'y'.

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

Add '-35' to each side of the equation.
35 + -35 + -28y = 21 + -35

Combine like terms: 35 + -35 = 0
0 + -28y = 21 + -35
-28y = 21 + -35

Combine like terms: 21 + -35 = -14
-28y = -14

Divide each side by '-28'.
y = 0.5

Simplifying
y = 0.5

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