(8y-7)-(5y+1)=4

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Solution for (8y-7)-(5y+1)=4 equation:


Simplifying
(8y + -7) + -1(5y + 1) = 4

Reorder the terms:
(-7 + 8y) + -1(5y + 1) = 4

Remove parenthesis around (-7 + 8y)
-7 + 8y + -1(5y + 1) = 4

Reorder the terms:
-7 + 8y + -1(1 + 5y) = 4
-7 + 8y + (1 * -1 + 5y * -1) = 4
-7 + 8y + (-1 + -5y) = 4

Reorder the terms:
-7 + -1 + 8y + -5y = 4

Combine like terms: -7 + -1 = -8
-8 + 8y + -5y = 4

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

Solving
-8 + 3y = 4

Solving for variable 'y'.

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

Add '8' to each side of the equation.
-8 + 8 + 3y = 4 + 8

Combine like terms: -8 + 8 = 0
0 + 3y = 4 + 8
3y = 4 + 8

Combine like terms: 4 + 8 = 12
3y = 12

Divide each side by '3'.
y = 4

Simplifying
y = 4

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