Question

If 2x+5y=180 and 3x+3y=180
what are the x and y values?

Answer 1

x=40,y=20

Explanation:

a{2x+5y=180

b{3x+3y=180

b-a

x-2y=0

x=2y

substitute:

2×2y+5y=180

9y=180

y=20

substitute:

x=2y

x=2×20

=40