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1/3x+y=4 help please?

Sagot :

OK..... so we know 4-y=1/3x. multiply everything by 3... 12-3y=x
[tex]\frac{1}{3}x+y=4\ \ \ \ \ |subtract\ \frac{1}{3}x\ from\ both\ sides\\\\y=4-\frac{1}{3}x[/tex]