Question

Selve each system of equations using substitution method.
-5a+b=8
7a+9b=-32​

Answer 1

Answer:

a=(-2), b=(-2)

Step-by-step explanation:

(-5a)+b=8--eq1

7a+9b=(-32)--eq2

(-5a)+b=8-›b=8+5a

Substitute b=8+5a in eq2

7a+9b=(-32)

7a+9(8+5a)=(-32)

7a+72+45a=(-32)

52a=(-32)-72

52a=(-104)

a=(-104)/52

a=(-2)

Substitute a=(-2) in eq1

(-5a)+b=8

(-5(-2))+b=8

10+b=8

b=8-10

b=(-2)