Question

Use the elimination method, solve each of the following pairs of simultaneous equations.
i)7x-3y=15
11x-3y=21
ii)3y-2x=9
2y-2x=7
iii)3a-2b=5
2b-5a=9
iiii)5c-2d=9
3c+2d=7

Answer 1

I hope this answer is right .

Answer 2

i)x=+3/2,y=-3/2
ii)x=-3/2,y=+2
iii)a=-7,b=-13
iiii)c=+2,d=+1/2