Answer:
(-3, -2)
Explanation:
-3x -4y = 17
x -y = -1 Can be rewritten x = y - 1
Substitute y -1 for x into the first equation
-3(y - 1) - 4y = 17 Distribute the -3
-3y + 3 -4y = 17 Combine like terms
-7y + 3 = 17 Subtract 3 from both sides
-7y = 14 Divide both sides by -7
y = -2
Substitute -2 for y in x = y -1 to solve for x
x = -2 -1
x = -3
Check
-3x -4y = 17
-3(-3) - 4(-2) = 17
9 + 8 = 17
17 = 17 checks
x -y = -1
-3 -(-2) = -1
-3 + 2 = -1
-1 = -1 checks