Question

Solve the following system of equations:
5x+4y=25
3x+4y=15

Answer 1

x=5;

Answer 2

subtract the second equation from the first

Answer 3

5x+4y - (3y+4y)=25 - 15 simplify and solve :-)

Answer 4

no solution for y

Answer 5

http://www.purplemath.com/modules/systlin1.htm

Answer 6

thank you!

Answer 7

5x+4y=25 3x+4y=15
5x+4y -(3x+4y)=25-15
2x=10 so x=5

if x=5 then 5x+4y=25 yields, 5(5)+4y=25
so 25+4y=25 which yields y=0
so your solution is (5,0) meaning at the point (5,0) your two lines intersect