Solve the system by substitution.

-x+2y=57

10x=y

Answer: x = 3

y = 30

Step-by-step explanation:

substitute y = 10x into the first equation, we have

- x + 2 (10x) = 57

-x + 20x = 57

19x = 57

x = 57/19

x = 3

Substitute x = 3 into the second equation

10 (3) = y

Therefore y = 30