Question 66336
3X/5-Y/4=7
.6X-.25Y=7
.08X+.05Y=1.6 MULTIPLY THIS EQUATION BY 5 & ADD
.4X+.25Y=8
.6X-.25Y=7
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X=15 SOLUTION NOW SUBSTITUTE 15 FOR X & SOLVE FOR Y
.6*15-.25Y=7
9-.25Y=7
-.25Y=7-9
-.25Y=-2
Y=-2/-.25
Y=8 SOLUTION
PROOF
.08*15+.05*8=1.6
1.2+.4=1.6
1.6=1.6