(y-4)-(y-7)=8y

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


Simplifying
(y + -4) + -1(y + -7) = 8y

Reorder the terms:
(-4 + y) + -1(y + -7) = 8y

Remove parenthesis around (-4 + y)
-4 + y + -1(y + -7) = 8y

Reorder the terms:
-4 + y + -1(-7 + y) = 8y
-4 + y + (-7 * -1 + y * -1) = 8y
-4 + y + (7 + -1y) = 8y

Reorder the terms:
-4 + 7 + y + -1y = 8y

Combine like terms: -4 + 7 = 3
3 + y + -1y = 8y

Combine like terms: y + -1y = 0
3 + 0 = 8y
3 = 8y

Solving
3 = 8y

Solving for variable 'y'.

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

Add '-8y' to each side of the equation.
3 + -8y = 8y + -8y

Combine like terms: 8y + -8y = 0
3 + -8y = 0

Add '-3' to each side of the equation.
3 + -3 + -8y = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -8y = 0 + -3
-8y = 0 + -3

Combine like terms: 0 + -3 = -3
-8y = -3

Divide each side by '-8'.
y = 0.375

Simplifying
y = 0.375

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