Question

Solve x-2y=0 and 5x+4y-20=0

Answer 1

Answer:

$x=\frac{20}{7} and y= \frac{10}{7}$

Step-by-step explanation:

x-2y=0

multiply 2 in above equation,

2x-4y=0

5x+4y=20   (5x+4y-20=0)

adding the above equations, we get,

2x-4y+5x+4y=20+0

7x=20

x=$\frac{20}{7}$

putting $x=\frac{20}{7}$, in x-2y=0, we get,

$\frac{20}{7}+2y=0\\ 2y=\frac{20}{7} \\y=\frac{10}{7}$