Question

Solve the following system of equations
for x:

2x+y=4
x-2y=7

1)2
2)3
3)5
4)7

Answer 1

3

Answer 2

you can use substitution to solve first for y then for x. Just get one equation to look like x=.... then solve for x with substitution

Answer 3

man this is easy multiply the 2nd eq with 2 you will get 2x-4y=14 then minus them 2x+y=4 - 2x-4y=14
5y = 10
y = 2
x = 7-(-(2))

Answer 4

= 5 ..3

Answer 5

it's 3 sorry I'm wrong.
2x(2x+y=4)
4x+2y =8
x-2y = 7
add them
5x = 15
x = 3