5÷x+6y=13 3÷x+4y=7 solve by cross multiplication
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x(5/x+6y)=133+4y/7
x×5/x+x×6y=133+4y/7
in x×5×x x will cut the other x.
then x will multiply with 6 y then we will get 6xy .
so the new equation will be
5+6xy=133+4y/7
7 is on RHS it will be moved to LHS so now 7 was dividing on the RHS it will multiply in LHS
7(5+6xy)=133+4y
35+30xy=133+4y
30xy-4y=133-35
30xy-4y=98
30xy-y=98/4
xy-y=49/2/30
xy-y=49/2×1/30
xy-y= 49/60
after simplifying we will get
xy-y=
xy-y= 0.8166667
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