Solve the system of equations by graphing

2x+y=8
X+3y=9

2 answers

y = 2, x = 3
visit rechneronline.de/function-graphs

for excellent graphs. Set the limits for x and y and let 'er fly.

The only inconvenience is that you need to express y as a function of x first.

For more versatile graphs, but less control over ranges, try

wolframalpha.com and enter

plot 2x+y=8, x+3y=9