Answer: (4, 3)
Explanation:
-4x + 3(2x-5) = -7 // substitute y=2x-5 for y in the first equation
-4x + 6x - 15 = -7 // simplify by distributing the 3
2x = 8 // add 15 to both sides and simplify
x = 4 // divide both sides by 2
Now that we know x=4, we can substitute this value into either equation to find y. Let's use y=2x-5:
y = 2(4) - 5 = 3
the solution to the system of equations is (4, 3).