Question

Solve the system by substitution.
-x+2y=57
10x=y

Answer 1

Answer: x = 3

y = 30

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