brooked251 brooked251

15-12-2017
Mathematics

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using elimination process what is the answer for

14x+2y=18
-7x-4=9

use steps

Respuesta :

tynollette tynollette

15-12-2017

step 1; multiple equation 2 by -2: 14x+8y=-18
step2: subtract this new equation from equation 1 to eliminate x:
2y-8y=18-(-18)
-6y=36
y=-6
step 3: substitute y=6 in equation 2: -7x-4*(-6)=9, -7x=-15, x=15/7

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