-(z+7)+(2z+1)=-3(z+1)

Solution for -(z+7)+(2z+1)=-3(z+1) equation:

Simplifying
-1(z + 7) + (2z + 1) = -3(z + 1)

Reorder the terms:
-1(7 + z) + (2z + 1) = -3(z + 1)
(7 * -1 + z * -1) + (2z + 1) = -3(z + 1)
(-7 + -1z) + (2z + 1) = -3(z + 1)

Reorder the terms:
-7 + -1z + (1 + 2z) = -3(z + 1)

Remove parenthesis around (1 + 2z)
-7 + -1z + 1 + 2z = -3(z + 1)

Reorder the terms:
-7 + 1 + -1z + 2z = -3(z + 1)

Combine like terms: -7 + 1 = -6
-6 + -1z + 2z = -3(z + 1)

Combine like terms: -1z + 2z = 1z
-6 + 1z = -3(z + 1)

Reorder the terms:
-6 + 1z = -3(1 + z)
-6 + 1z = (1 * -3 + z * -3)
-6 + 1z = (-3 + -3z)

Solving
-6 + 1z = -3 + -3z

Solving for variable 'z'.

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

Add '3z' to each side of the equation.
-6 + 1z + 3z = -3 + -3z + 3z

Combine like terms: 1z + 3z = 4z
-6 + 4z = -3 + -3z + 3z

Combine like terms: -3z + 3z = 0
-6 + 4z = -3 + 0
-6 + 4z = -3

Add '6' to each side of the equation.
-6 + 6 + 4z = -3 + 6

Combine like terms: -6 + 6 = 0
0 + 4z = -3 + 6
4z = -3 + 6

Combine like terms: -3 + 6 = 3
4z = 3

Divide each side by '4'.
z = 0.75

Simplifying
z = 0.75