Question 100064
This is a system of 2 linear equations with two variables. You can, for instance, express the x from second equation(in terms of y) and substitute it into first equation - thus you'll get linear equation with one variable.Which you can easily solve and substituting answer into any of the original equations get the rest of the solution.

2x+3y=11
x-4y=0   /+4y
x=4y

2x+3(4y)=11
2(4y)+3y=11
8y+3y = 11
11y = 11
y = 1

now we can substitute into any equation
i.e.: 2x+3(1)=11
2x+3 = 11 /-3
2x = 8 /:2
x = 4


after plotting it looks like this:
{{{ graph( 400, 300, -5, 10, -5, 10, x/4, (11-2*x)/3) }}}