-13=-6a+7a

Solution for -13=-6a+7a equation:

Simplifying
-13 = -6a + 7a

Combine like terms: -6a + 7a = 1a
-13 = 1a

Solving
-13 = 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.
-13 + -1a = 1a + -1a

Combine like terms: 1a + -1a = 0
-13 + -1a = 0

Add '13' to each side of the equation.
-13 + 13 + -1a = 0 + 13

Combine like terms: -13 + 13 = 0
0 + -1a = 0 + 13
-1a = 0 + 13

Combine like terms: 0 + 13 = 13
-1a = 13

Divide each side by '-1'.
a = -13

Simplifying
a = -13