Total curb weight Algebra, HELP

Question

The total curb weight of a​ truck, a car​ A, and a car B is

11,250 lb. The weight of car A is 5 lb less than the weight of two B cars. The truck weighs

2145 lb more than car A. What is the curb weight of each​ vehicle?

Answer 1

T+A+B = 11250

A = 2B-5

T = A+2145

Then T = (2b-5)+2145 = 2b+ 2140

2b + 2140 + 2b-5 +b = 11250

5b +2135 = 11250

5b = 9115

b = 1823

a = 2b - 5 = 2(1823)-5 = 3641

t = a + 2145 = 3641 +2145 = 5786