Answer:8.5b - 3.4(13a - 3.2b) + a = 19.4b - 43.2aStep-by-step explanation:It is a simple mathematical problem with multiple like terms. We can solve it by applying basic mathematical rules of multiplication and addition/subtration. 8.5b - 3.4(13a - 3.2b) + a= 8.5b - 3.4*13a -3.4*(-3.2b) + a= 8.5b - 3.4*13a + 3.4*3.2b + a= 8.5b - 44.2a + 10.88 b + aNow, only like terms can be added to each other= (8.5b + 10.9b) + (a - 44.2a)= 19.4b + (-43.2a)= 19.4b - 43.2a