Seven years ago,scott was 3 times as old as Kathy was at that time.If Scott is now 5 years older than Kathy,how old is Scott?
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Sevenyearsago,scottwas3timesasoldasKathywasatthattime.IfScottisnow5yearsolderthanKathy,howoldisScott
Seven years ago,scott was 3 times as old as Kathy was at that time.If Scott is now 5 years older than Kathy,how old is Scott?
Seven years ago,scott was 3 times as old as Kathy was at that time.If Scott is now 5 years older than Kathy,how old is Scott?
Seven years ago,scott was 3 times as old as Kathy was at that time.If Scott is now 5 years older than Kathy,how old is Scott?
7年前,斯科特的年龄是凯西的3倍.如果现在斯科特比凯西大5岁,问斯科特现在多大?
y-7=3(x-7)
y=x+5
解方程组得y=14.5
斯科特14岁半
七年前,斯科特的年龄是凯西的三倍。如果斯科特现在比凯西大五岁,那么斯科特几岁了?
列方程。设凯西的年龄是X 斯科特的年龄是Y
3(X-7)=Y-7
Y-X=5 解出这个方程组就行
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