Question

Solve 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

substitute y in place of x in first equation

Answer 2

10(y-3) +10y=1
solve for y

Answer 3

i need a lil more help then that @Fifciol

Answer 4

@Fifciol is right. X is already solved for you, it's just x=y-3. Next you need to find y. That's what he did.

Answer 5

do you need help solving
\[10(y-3) +10y=1\]?

Answer 6

10(y-3)+10y=1
=>10y-30+10y=1
=>20y=1+30
=>y=31/20