5-2 (4a+1) + 3a=13

A = 2/3

A = - 2

A = - 6/5

A=2

a = - 2

Simplifying 5 + - 2 (4a + 1) + 3a = 13 Reorder the terms: 5 + - 2 (1 + 4a) + 3a = 13 5 + (1 * - 2 + 4a * - 2) + 3a = 13 5 + (-2 + - 8a) + 3a = 13 Combine like terms: 5 + - 2 = 3 3 + - 8a + 3a = 13 Combine like terms: - 8a + 3a = - 5a 3 + - 5a = 13 Solving 3 + - 5a = 13 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + - 3 + - 5a = 13 + - 3 Combine like terms: 3 + - 3 = 0 0 + - 5a = 13 + - 3 - 5a = 13 + - 3 Combine like terms: 13 + - 3 = 10 - 5a = 10 Divide each side by '-5'. a = - 2