Question 324722
1.{{{15x + y = 30}}}
2.{{{x + 6y = 4}}}
Use eq. 1,
{{{15x+y=30}}}
{{{y=30-15x}}}
Substitute into eq. 2,
{{{x+6(30-15x)=4}}
{{{x+180-90x=4}}}
{{{-89x=-176}}}
{{{highlight(x=176/89)}}}
Then from the previous equation,
{{{y=30-15x}}}
{{{y=30-(15(176))/89}}}
{{{y=(2670-1640)/89}}}
{{{highlight(y=30/89)}}}