Question 753654
Using the equation {{{y=3x-1}}} and the indicated value for {{{x}}}, {{{x=5}}},
we substitute that value of {{{x}}}, {{{x=5}}}, into {{{y=3x-1}}}
to find {{{y=3*5-1}}} --> {{{y=15-1}}} --> {{{highlight(y=14)}}}
The ordered pair (5,14) (with {{{x=5}}} and {{{y=14}}} is a solution.
 
NOTE: The ordered pair (0,-1) is also a solution, and so are infinity of other ordered pairs. Together, they represent a straight line in the x-y plane. Luckily you only need to plot two points to be able to graph that line.
{{{drawing(300,300,-4,16,-4,16,
grid(1),
blue(circle(0,-1,0.3)),
blue(circle(5,14,0.3)),
blue(line(-2,-7,8,23))
)}}}