Question

olve the following system of equations by the substitution method.

10x + 10y = 1

x = y - 3

What is the value of y?

-29/20
31/20
-3/2

Answer 1

See, x = y - 3

Put this value in First Equation:

10(y - 3) + 10y = 1

10y - 30 + 10y = 1

20y = 1 + 30

20y = 31

y = 31/20 is the answer...

Answer 2

thx i had got confused y it was 31/20 but its because u had to divid 31by 20