8a+b-c-7a=

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

Simplifying
8a + b + -1c + -7a = 0

Reorder the terms:
8a + -7a + b + -1c = 0

Combine like terms: 8a + -7a = 1a
1a + b + -1c = 0

Solving
1a + b + -1c = 0

Solving for variable 'a'.

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

Add '-1b' to each side of the equation.
1a + b + -1b + -1c = 0 + -1b

Combine like terms: b + -1b = 0
1a + 0 + -1c = 0 + -1b
1a + -1c = 0 + -1b
Remove the zero:
1a + -1c = -1b

Add 'c' to each side of the equation.
1a + -1c + c = -1b + c

Combine like terms: -1c + c = 0
1a + 0 = -1b + c
1a = -1b + c

Divide each side by '1'.
a = -1b + c

Simplifying
a = -1b + c