Respuesta :

Answer:

15

Step-by-step explanation:

5a-10b=45, b=3

  • 5a-10*3=45
  • 5a= 45+30
  • 5a= 75
  • a= 75/5
  • a=15

Answer:

the value of a=15

Step-by-step explanation:

5a-10b=45

5a-10(3)=45

5a-30=45

+30 +30

5a/5 = 75/5

a=15