sanabiljk sanabiljk

06-12-2020
Mathematics

contestada

Solve the following using
matrix inversion method
7x-2y=17
3x+4y=17

Respuesta :

student11221 student11221

06-12-2020

Answer:

y=2

Step-by-step explanation:

7x-2y=17....1

3x+4y=17...2

multiply 1by 2

then

subtract 1 and 2

14x -4y=34

3x +4y=17

from this

17x=51

x=3

then from 1

7(3)-2y=17

21-2y=17

-2y=17-21

-2y=-4

y=4/2

y=2

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