Question 236176
X/2+Y/3=570 MULTIPLY BY 2
X/3+Y/2=580 MULTIPLY BY -3 & ADD
X+2Y/3=1140
-X-3Y/2=-1,740
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2Y/3-3Y/2=-600
(2*2Y-3Y*3)/2*3=-600
(4Y-9Y)/6=-600
-5Y=-600*5
-5=-3,600
Y=-3,600/-5
Y=720 ANS. NUMBER OF GIRLS.
X/2+720/3=570
X/2+240=570
X/2=570-240
X/2=330
X=330*2
X=660 ANS. NUMBER OF BOYS.
PROOF:
660/3+720/2=580
220+360=580
580=580
BOYS = GIRLS
660+720=1,380 TOTAL NUMBER OF STUDENTS.