#### Answer

$(25\frac{5}{11},6\frac{4}{11})$

#### Work Step by Step

Substitute 4y for x in the 2nd equation and solve for y.
$3x-y=70$
$3(4y)-y=70$
$12y-y=70$
$11y=70$
$11y\div11=70\div11$
$y=6\frac{4}{11}$
Substitute $6\frac{4}{11}$ for y in the first equation.
$4y=x$
$4(6\frac{4}{11})=x$
$25\frac{5}{11}=x$
Substitute the values into each equation to check the answer.
$4y=x$
$4(6\frac{4}{11})=25\frac{5}{11}$
$25\frac{5}{11}=25\frac{5}{11}\checkmark$
$3x-y=70$
$3(25\frac{5}{11})-6\frac{4}{11}=70$
$76\frac{4}{11}-6\frac{4}{11}=70$
$70=70\checkmark$