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5x=x-9 and 4x-10y=8
lets graph that on desmos cause I'm too lazy to subsitute it .
it has one answer
He scored 24 points which means that after scoring the 4 three pointers, he would have to score another 4 three pointers (12 points)
I would try using a table. It might work better.
It would be 20 percent, I believe. First you would put it into a fraction of 12\60, then you would simplify that into 3\15 then divide as shown. You end up with .2 which would be 20 percent.