Question 263569
here are the equations
(i) {{{7x+4y=5}}} 
(ii) {{{x-6y=-19}}}
step 1 - multiply (i) by 3 and multiply (ii) by 2 to get
(iii) {{{21x + 12y = 15}}}
(iv) {{{2x - 12y = -38}}}
step 2 - add down to get
(v) {{{23x = -23}}}
so, x = -1
then y = 3