SOLUTION: Solve 3/8x - 1/2y = 1 0.2x + 0.6y = 4

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: Solve 3/8x - 1/2y = 1 0.2x + 0.6y = 4      Log On


   

Question 65089This question is from textbook An Incremental Development
: Solve
3/8x - 1/2y = 1
0.2x + 0.6y = 4 This question is from textbook An Incremental Development

Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
.375X-.5Y=1
.2X+.6Y=4 NOW MULTIPLY EQUATION 1 BY .6 & THE SECOND EQUATION BY .5 A& ADD
.225X-.3Y=.6
.1X+.3Y=2
----------------------------
.325X=2.6
X=2.6/.325
X=8 SOLUTION. NOW SUBSTITUTE 8 FOR X IN EITHER EQUATON & SOLVE FOR Y
.2*8+.6Y=4
1.6+.6Y=4
.6Y=4-1.6
.6Y=2.4
Y=2.4/.6
Y=4 SOLUTION
PROOF
.375*8-.5*4=1
3-2=1
1=1
3-4=1