Respuesta :

Answer:

c = 16, a= 27

Step-by-step explanation:

-3(4a + 3c) = -3(156)             Find a GCF

4(3a + 4c) = 4(145)                Make one negative to cancel out one variable

-12a - 9c = -468                    Solve for C

12a + 16c = 580

7c = 112

c = 16

3a + 4c= 145                         Substitute C into one of the original equations

3a + 4(16) = 145                     Solve for A

3a + 64 = 145

3a = 81

a = 27