-19=-7a+8a

Solution for -19=-7a+8a equation:

Simplifying
-19 = -7a + 8a

Combine like terms: -7a + 8a = 1a
-19 = 1a

Solving
-19 = 1a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-19 + -1a = 1a + -1a

Combine like terms: 1a + -1a = 0
-19 + -1a = 0

Add '19' to each side of the equation.
-19 + 19 + -1a = 0 + 19

Combine like terms: -19 + 19 = 0
0 + -1a = 0 + 19
-1a = 0 + 19

Combine like terms: 0 + 19 = 19
-1a = 19

Divide each side by '-1'.
a = -19

Simplifying
a = -19