Question 46580
{{{5x + 7y = b}}}
{{{mx + y = 22}}}
a solution is (-3,4)
{{{5*(-3) + 7*4 = b}}}
{{{-15 + 28 = b}}}
{{{b = 13}}}
{{{-3m + 4 = 22}}}
{{{3m = 4 - 22}}}
{{{3m = -18}}}
{{{m = -6}}}
check
is (-3,4) a solution?
{{{5x + 7y = b}}}
{{{5*(-3) + 7*(4) = 13}}}
{{{-15 + 28 = 13}}}
{{{13 = 13}}}
OK
{{{mx + y = 22}}}
{{{-6*(-3) + 4 = 22}}}
{{{18 + 4 = 22}}}
{{{22 = 22}}}
OK