Kim needed to fill up her trucks gasoline tank and gasoline costs $3.75 per gallon. If she paid $56.85, how many gallons of gas
1 answer:
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Answer:
y= -1/2
x=3/2
Step-by-step explanation:
first isolate x
2x+4y=1
2x=1-4y
x=(1-4y)/2
subsitute it in the second equation
look at the pic
