Question 434637
Solve:
{{{x = 4}}} A vertical line passing through the points (4, ?)
{{{2x+6y = 2}}} Substitute x = 4 and solve for y.
{{{2(4)+6y = 2}}} 
{{{8+6y = 2}}}
{{{6y = -6}}}
{{{y = -1}}} 
The solution is (4, -1)