Solve this equation and identify the solution

(3, -1)

Step-by-step explanation:

The easiest way to solve this system of equations is by elimination:

3x + y = 8

2x - y = 7

Add the two equations together:

(3x + 2x) + (y - y) = (8 + 7)

5x = 15

x = 3

Substitute x back into the equation:

2x - y = 7

2(3) - y = 7

6 - y = 7

- y = 1

y = -1

The fourth option, (3, -1)

x= -3

step-by-step explanation:

step 1: simplify brackets

4 - x - 1 = 6

step 2: simpilfy

3 - x = 6

step 3: subtract 3 from both sides

-x = 6 - 3

step 4: simpilfy 6 - 3

-x = 3

step 5: multiply both sides by -1

x = -3