Question

How many solutions does this have? x+2y=3 x-y=6

Answer 1

Uhhh I'll try my best.

The answer to your question is

I’ll do x.

x+2y-2y = 3-2y

(Simplify) x = 3-2y

x-y+y = 6+y

(Simplify) x = 6+y

(Set them equal to each other)

3-2y = 6+y

3-2y-6 = 6+y+2y

-3 = 3y

y = -1

x =

Step-by-step explanation: Hope this helps.

Answer 2

x = 5 , y = -1

Explanation:

x + 2y = 3........(equation 1)

x - y = 6..........(equation 2)

make x the subject of the formula in (equation 1)

x = 3 - 2y

substitute for x in (equation 2)

3x - y = 6

(3- 2y) - y = 6

3 - 2y - y = 6

3 - 3y = 6

-3y = 6 - 3

`( - 3y)/( - 3) = (3)/( - 3)`

`y = - 1`

substitute for y in (equation 1)

x = 3 - 2y

`* = 3 - 2( - 1)`

x = 5