7y-(8y+1)=4

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

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

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

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

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

Solving
-1 + -1y = 4

Solving for variable 'y'.

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

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

Combine like terms: -1 + 1 = 0
0 + -1y = 4 + 1
-1y = 4 + 1

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

Divide each side by '-1'.
y = -5

Simplifying
y = -5