3(y-7)-8y=4

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Solution for 3(y-7)-8y=4 equation:


Simplifying
3(y + -7) + -8y = 4

Reorder the terms:
3(-7 + y) + -8y = 4
(-7 * 3 + y * 3) + -8y = 4
(-21 + 3y) + -8y = 4

Combine like terms: 3y + -8y = -5y
-21 + -5y = 4

Solving
-21 + -5y = 4

Solving for variable 'y'.

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

Add '21' to each side of the equation.
-21 + 21 + -5y = 4 + 21

Combine like terms: -21 + 21 = 0
0 + -5y = 4 + 21
-5y = 4 + 21

Combine like terms: 4 + 21 = 25
-5y = 25

Divide each side by '-5'.
y = -5

Simplifying
y = -5

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