Question

Help with this system of equation problem.

Answer 1

multiply 2nd equation by 2
then add the 2 equations, what do u get ?

Answer 2

I used gaussean elimination and got my first row as 1 -1/4 -9/4 and second row as 0 0 0 because there are infinite solutions but I don't know how to compute my answer

Answer 3

yes, there r infinite solutions :)

so now we will express those infinite solutions in terms of only one variable, say 't'

so take x1= t
find y1 in terms of t

Answer 4

so I would have 1t - 1/4x2 = -9/4 --> 1t +9/4 = 1/4x2 --> 4t+9 =x2?

Answer 5

yes, and so your infinite solutions are

x1= t
x2 = 4t+9

for every value of 't' (means for infinitely many values of t)

Answer 6

aaaaaaaaaaaaaaahhhhhhh alright thank you so much!

Answer 7

welcome ^_^