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