Solve for x and y by substitution method P_W (i) x+y=a-b, a x-b y=a^2+b^2 (ii) x/a+y/b=2, a x-b y...

Solve for x and y by substitution method
P_W
(i) x+y=a-b, a x-b y=a^2+b^2
(ii) x/a+y/b=2, a x-b y=a^2-b^2
(iii) b x/a-a y/b+a+b=0, b x-a y+2 a b=0
(iv) 2(a x-b y)+a+4 b=0,
2(b x+a y)+(b-4 a)=0
(v) 2(x/a)+y/b=2, x/a-y/b=4

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[ayshadiyaah]

Thanks a lot PW, i was almost dead out of frustration solving them on my own. This vdeo made it very simple for me to solve.