adriana509 adriana509

17-10-2018
Mathematics

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y-4x=3. 2x-3y=21 can someone help

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imiaochen imiaochen

17-10-2018

Y-4X =3 ; 2x-3y=21

Y= 3+ 4x

2x -3( 3+4x)= 21

2x- 9- 12x= 21

-10x -9= 21

-10x -9+9= 21+9

-10x = 30

X= 30/-10= -3

Y= 3+4x = 3+ 4* (-3)= 3-12= -9

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