Question 166092
2(a+b)=94
2a+2b=94 multiply by -2 & add to the other equation
4(a-9)=3b-23
4a-36=3b-23
4a-3b=-23+36
4a-3b=13
-4a-4b=-188
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-7b=-188+13
-7b=-175
b=-175/-7
b=25 answer.
2(a+25)=94
2a+50=94
2a=94-50
2a=44
a=44/2
a=22 answer.
Proof:
4(22-9)=3*25-23
4*13=75-23
52=52