Question 310299
1.{{{3x +2y  = 7}}}
2.{{{kx - y  =5}}}
From eq. 2,
{{{kx-y=5}}}
{{{y=kx-5}}}
{{{2y=2kx-10}}}
Substitute this expression for y into eq. 1,
{{{3x+2y=7}}}
{{{3x+2kx-10=7}}}
{{{x(3+2k)=17}}}
{{{highlight(x=17/(3+2k))}}}
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{{{B}}} is the correct answer.