Find the value of xy if 11x + 13y = 22 and 13x + 11y = 26.
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Step-by-step explanation:
11x+13y=22 ______eqi
13x+11y=26------------eqii
eqi+eqii
11x+13y+13x+11y=22+26
24x+24y=48
24 (x+y)=48
x+y=2-------eqiii
eqii-eqi
13x+11y-(11x+13y)=26-22
2x-2y=4
x-y=2------eqiv
eqiii+eqiv
x+y+x-y=2+2
2x=4
x=2
y=0
xy=0
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