Respuesta :

8.5b.
7a= 5a +3b
-5a -5a
2a = 3b
/2
a= 1.5b
Solve by substitution and you get;
8.5b=8.5b
Because of the lack of constants in the equation there isn't a definite answer.
tq559

Answer:

a = 3/2b

Step-by-step explanation:

 7a - 2b = 5a +   b

      +2b          + 2b

 7a = 5a + 3b

-5a    -5a

2a  =  3b

/2      /2

a = 3/2b