Search 75,680 tutors
FIND TUTORS
Ask a question
0 0

HELP ME OUT PLEASE SOLVE IT..............

Solved the system by substitution.if the system is inconsistent and has no solution,state this .if the system is dependent,write the form of the solution for any real number x.


(1) 3x+12y=10
     x+4=7


(2) 9x-6y=19
      -x+8y=4

(3) x+y=9000
     0.06x+0.15y=1215

(4) x+y=50
     0.25x+0.75y=0.60(50)
Tutors, please sign in to answer this question.

1 Answer

1) x=3, y=1/12
2) y=(4+x)/8, 9x-6[(4+x)/8]=9x-3-(3/4)x=(33/4)x-3=19, (33/4)x=22, x=88/33, y=5/6
3) y=9000-x, (6/100)x+(15/100)(9000-x)=(6/100)x+1350-(15/100)x=-(9/100)x+1350=1215, -(9/100)x=-115, x=11500/9, y=69500/9
4) y=50-x, (1/4)x+(3/4)(50-x)=-(1/2)x+150/4=30, -(1/2)x=-30/4, x=15,
y=35