Answer
$(2,-3)$
Work Step by Step
To solve the given problem we will have to plug the simplest equation into the other equation and then solve for the other variable.
$3x-4(1-2x)=18$
or, $11x-4=18$
or, $11x=2$
or, $x=2$
Now, $y=1-2x=1-2(2)=-3$
Hence, the desired result is: $(2,-3)$