How do I use substitution to solve these systems of equations?:3/4x=1/3y=1x-y=10

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First you have to make one equation equal x or y..... like the second problem x-y=10 (add y to both sides) x=y+10(Plug it in to the other equation as x) 3/4(y+10)=1/3y(um is it supposed to b =?) Um that's all I can do 'cause the 2 equal signs don't make sense... Hopefully this helps you a bit