find k if x+2y=3 and 5x+ky=-7
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given:x+2y=3
5x+ky=-7
a1/a2=b1/b2 is not equal toc1/c2
x/5=2/k is not equal to -3/7
x/5=2/k=k=5×2/x=10/x
x=-10
5x+ky=-7
a1/a2=b1/b2 is not equal toc1/c2
x/5=2/k is not equal to -3/7
x/5=2/k=k=5×2/x=10/x
x=-10
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