Question

X+2y=5,3x-4y=15 no solution

Answer 1

x + 2y =5 -------------{1}
3x - 4y =15 -----------{2}

MULTIPLY {1} BY 2

2x + 4y =10 -----------{3}

ADD {2} AND {3}

3x - 4y =15
+ 2x + 4y=10
= 5x =25
.: x =25/5
.: x =5

PUT x =5 IN {3}

.: 2x + 4y =10
.: 2(5) + 4y =10
.: 10 + 4y =10
.: 4y = 10 - 10
.: 4y =0
.: y = 0/4
.: y =0

.: x = 5 and y = 0 is the solution for this equation.

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