Question

2. 2x - y = 6,
- x + y = -1

Answer 1

y=3.166 x=4.166

Explanation:

Answer 2

x = 5

y = 4

Explanation:

just substitute the value of one variable into the other

-x +y = -1

or y = -1 +x <-------- (i just added x to the right side)

now u know what y is equal to, just substitute that value into the first equation

2x - (-1+x) = 6 <-------- instead of y, i put the value of y from the 2 equation

NOW SOLVE FOR X!

2x +1 -x = 6

x + 1 = 6

x = 5

now solve for y since you have the value of x

y = -1 + x

or y = -1 + 5

y = 4