Question

甲、乙两人原有钱数比为6:5,后来甲又得1800元,乙又得300元.这使两人钱数比为18:11,甲、乙原来各有多少元

Answer 1

设甲原来有6X元,则乙原来有5X元:

(6X+1800):(5X+300)=18:11

18(5X+300)=11(6X+1800)

90X+5400=66X+19800

90X-66X=19800-5400

X=14400/24=600(元)

6X=3600(元),甲原来有3600元;

5X=3000(元),乙原来有3000元;