Question

    a+a-b-b+a-b+a+a=3    ¿cuanto vale a y b ?

Answer 1

a + a - b - b + a - b + a + a = 3
5a - 3b = 3
5(3) - 3(4) = 3
15 - 12 = 3
3 = 3

a = 3
b = 4