Question

Solve the System of Equations

3x-4y=12
1/3x-4/9y=4/3

Answer 1

y=3(x-4)/4 for the first one

Answer 2

what is x and y =?

Answer 3

So we have:
3x-4y=12
1/3x-4/9y=4/3
let's do it by substitution, meaning that we take one of the ecuations and solve it for a variable, I'll take the second one and solve it for y:
\[\frac{ 1 }{ 3x-4 }-\frac{ 4 }{ 9y }=\frac{ 4 }{ 3 }\]
Let's isolate y:
\[\frac{ 1 }{ 3x-4 }=\frac{ 4 }{ 3 }+\frac{ 4 }{ 9y }\]
\[\frac{ 1 }{ 3x-4 }=\frac{ 4(9y)+4(3) }{ 3(9y)}\]