Use substitution to solve the system.

Question

tootsi123 · Answer

attachment

tootsi123 · Answer

I just want to know if this is a correct answer. @Nnesha

tootsi123 · Answer

Anybody? Please.

nnesha · Answer

work please :=)) 
or explain how did you get the answer :=)
to check the answer you can substitute -99 for x and -17 for y in both equation  :=))

tootsi123 · Answer

$$-5y=\frac{ -14-3x }{ -5 }$$

tootsi123 · Answer

$$y=\frac{ 14 }{ 5 }+\frac{ 3 }{ 5 }x$$

nnesha · Answer

oh wait a sec 
look at 2nd equation 
`y=2x+7`  so just substitute y for 2nd equation

nnesha · Answer

they already solved 2nd equation for y

tootsi123 · Answer

alright 
$$3x-5(2x+7)$$

nnesha · Answer

looks good and that's equal to  -14  
$$3x-5(2x+7)=-14$$
same steps just like we did on a previous post :=)

tootsi123 · Answer

okay... 
3x-10x-35=-14
-7x-35=-14
-7x=21
x=-3

tootsi123 · Answer

correct?

nnesha · Answer

perfecT!!

tootsi123 · Answer

okay so then whats y? Sorry

nnesha · Answer

substitute x for -3 in 2nd equation :=))

tootsi123 · Answer

okay wait wouldn't y be equal to one

nnesha · Answer

that's what i got :=)) nice job!

tootsi123 · Answer

okay thank you :)

nnesha · Answer

lets check the answer $$\rm 1=2(-3)+7~~~~   1=1$$ substitute x and y value in both equation if you get equal sides then your answer is correct 
$$3(-3)-5(1)=-14~~~~~~~-14=-14$$
(-3,1) worked out for both equation os yes it's correct

nnesha · Answer

np :=))

tootsi123 · Answer

yes it did :)