amirrahbouey amirrahbouey

06-11-2019
Mathematics

contestada

solve the system below by the elimation
7x+2y=24
8x+2y=30

Respuesta :

KurdishPotato KurdishPotato

06-11-2019

Answer:

x = 6

y = -9

Step-by-step explanation:

multiply first equation by -1

-1 ×(7x +2y)= 24 ➡ -7x-2y = -24

now add this to the second equation

-7x-2y +8x +2y = 30-24

x = 6

use thus value to find y

8×6 + 2y = 30 ➡2y = 30-48

y= -9

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