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

alright lets go step by step ;D

Answer 2

\[x=y-3; 10x+10y=1\]

Answer 3

ok

Answer 4

\[10x+10y=1\]

\[10(y-3)+10y=1\]

Answer 5

\[10\times10=?\]

Answer 6

10x + 10y =1
x - y = -3 (multiply by 10 )
then
10x+10y =1
10x-10y =-30
adding both new equations
20x=-29
x=-29/20
then subistute
y = 31/20

Answer 7

please go step by step with the user so they won't be confused

Answer 8

it is my first hour here sorry

Answer 9

okk