a+b-7a-8b=

Solution for a+b-7a-8b= equation:

Simplifying
a + b + -7a + -8b = 0

Reorder the terms:
a + -7a + b + -8b = 0

Combine like terms: a + -7a = -6a
-6a + b + -8b = 0

Combine like terms: b + -8b = -7b
-6a + -7b = 0

Solving
-6a + -7b = 0

Solving for variable 'a'.

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

Add '7b' to each side of the equation.
-6a + -7b + 7b = 0 + 7b

Combine like terms: -7b + 7b = 0
-6a + 0 = 0 + 7b
-6a = 0 + 7b
Remove the zero:
-6a = 7b

Divide each side by '-6'.
a = -1.166666667b

Simplifying
a = -1.166666667b