Question

Solve this system of equations by substitution. Determine whether the system is consistent or inconsistent.
2x+y=9
y=5x+2

Answer 1

Put 5x+2 in place of y in 2x+y=9 and solve for x.
Can u do that @Educate_Me?

Answer 2

Yes, then I did 2(5x+2)=9
10x+4=9
-4 -4
10x=5
divide both sides by 10 , is that right ?

Answer 3

hmm no.
2x+y=9
2x+5x+2=9
7x+2=9
Nw try to solve

Answer 4

I got it! I substituted the 1 I got for x into the y and got the ordered pair (1,7)

Answer 5

Perfect:)

Answer 6

now this one , I am very confused..
1/2x + 3/2y=-7
1/3y=2x-10

Answer 7

\[\frac{ 1 }{ 2}x+\frac{ 3 }{ 2 }y=-7\]
\[\frac{ 1 }{ 3 }y=2x-10\]

Answer 8

R those the eqns?

Answer 9

Yes.

Answer 10

what do u get when u multiply ur second equation by 3?

Answer 11

umm , 3y=2x-10?

Answer 12

hmm no.