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18x+3y=-8 y=-6x+7 substiution
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18x+3y=-8 y=-6x+7 substiution

User Egiray
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So we already have it as y= a number correct?

So plug in Y for the first equation and we get

18x+3(-6x+7)=-8

And solve from there and we will get NO SOLUTION :D
User Andrei Bucurei
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