Question

5x+y=7
20x+2=y
What does x=?
What doesy=?

Answer 1

Answer: y = 6 x = 0.2

Explanation:

5x+y=7

20x+2=y

re-write one

5x + y = 7 OR y = 7 - 5x

substitution

20x + 2 = 7 - 5x

20x + 5x = 7 - 2

25 x = 5

x = 5/25

x = 0.2

now for finding y

y = 7 - 5x

y = 7 - 5(0.2)

y = 7 - 1

y = 6