Find the intersection point of the lines 5x-2y=18 and 2x+y=9
We can solve it by substitution. From the second equation we have y=9-2x. If we substitute y in the first equation we have:
5x-2(9-2x)=18
5x-18+4x=18
9x=36
x=4
Substituting this value in any of the equations we can fi