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how you need to solve it with sustitution method or elimination method ?

I found z by using the equations 1 and 3 and it doesnt tell i need help with x and y

i got z=-3 and i know the answer for y is -1 and x is 4 but i dont know how to get them

wait how would set the up?

this?

3x+2y-3=7
5x+5y+4*(-3)=3
so can you make the calcule here ?

courage this is easy

how do you figure this out? i feel like an idiot right now

so you dont wann making the calcules here for ?

-12 for the second equation?

but how will be firstly the first equation ?

3x+2y=10 do you understand how i have got this result ?

oh okay! you added plus three to the 7? and so the 3 crosses out then?

yes sure
so than how you get the second equation ?

5x+5y-12=-9

equal 3 and not -9

okay so what do i do after that?

so will get
5x+5y-12=3 so now add to both sides 12 and will get ????

5x+5y=15

yes so now there are two equation
3x+2y=10
5x+5y=15
yes ?

ok ?

okay! got it so far

can you solve these system for x and y ?

yeah let me work it out

ok now im confused

15?

why 15 ? and why not just 5 ???

yes 5 right so than how will be the second equation ?

im sorry what do you mean?

okay i see what your ssaying

so than now there are
3x+2y=10
x+y=3
can you solve it now ?

what will you solve first the x or y? do you need to get rid of one?

i got it! i got the answr for y! y=-1

how ?

ah thats why i just for x! i get it thank you!

so than
4 +y=3
y=3-4
y=-1
so than result that you have got it right
ok ?

yup! thats what i did, thank you so much

was my pleasure
yw
good luck
bye