5+3a+(-7a)-(-8)=

Solution for 5+3a+(-7a)-(-8)= equation:

Simplifying
5 + 3a + (-7a) + -1(-8) = 0

Multiply -1 * -8
5 + 3a + (-7a) + 8 = 0

Reorder the terms:
5 + 8 + 3a + (-7a) = 0

Combine like terms: 5 + 8 = 13
13 + 3a + (-7a) = 0

Combine like terms: 3a + (-7a) = -4a
13 + -4a = 0

Solving
13 + -4a = 0

Solving for variable 'a'.

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

Add '-13' to each side of the equation.
13 + -13 + -4a = 0 + -13

Combine like terms: 13 + -13 = 0
0 + -4a = 0 + -13
-4a = 0 + -13

Combine like terms: 0 + -13 = -13
-4a = -13

Divide each side by '-4'.
a = 3.25

Simplifying
a = 3.25