Answer: (3, -4)
Step-by-step explanation: To solve this system of equations by substitution, the idea is simple.
Since our first equation tells us that y = 2x - 10, this means that we can substitute a 2x - 10 in for the y in our second equation.
In other words, since y means the same thing as 2x - 10, we can replace the y in the second equation with a 2x - 10.
If we rewrite our second equation, we have 3x - 7(2x - 10) = 37.
Solving from here, you should find that x = 3.
Now plug a 3 back in for the x in our first equation
to get y = 2(3) - 10 or 6 - 10 which is -4.
So our solution is (3, -4).