Question

PLEASE PLEASE PLEASE HELP?

Use the substitution method to solve the following system of equations.4x - y = 3
7x - 9y = -2


Answers:




(1, 1)

(6, -3)

(6, 1)

(1, -3)

Answer 1

I beg of you to help

Answer 2

hello..

4x-y=3
7x - 9y = -2

from the first equation we get :
y = 4x -3

substitute it into the second :
7x - 9(4x-3) = -2
7x -36x +27 = -2
-29x = -29
x= 1

substitute x=1 into one of the original equations and get :
4 * 1 -y = 3
y = 1

(1,1)

Answer 3

oh my god.....you're amazing..................

Answer 4

how about the 4x4 determinant from that day .. you managed to do it ?

Answer 5

Yes

Answer 6

oh im glad to hear that