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Maths!!!
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1. If 9 : 2 = 18 : ( z-3 ), find the vale of z. 9/2=18/(z-3) 9(z-3)=2(18) z-3=4 z=7 2. a : b = 1/2:1/4 , b : c = 1/8 : 1/12 , find a : b : c. a:b=2:1 and b:c=3:2 Let a=2b and c=2/3b a : b : c =2b:b:2/3b =2:1:2/3 =6:3:2
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Maths!!!
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1. If 9 : 2 = 18 : ( z-3 ), find the vale of z. 2. a : b = 1/2:1/4 , b : c = 1/8 : 1/12 , find a : b : c.最佳解答:
1. If 9 : 2 = 18 : ( z-3 ), find the vale of z. 9/2=18/(z-3) 9(z-3)=2(18) z-3=4 z=7 2. a : b = 1/2:1/4 , b : c = 1/8 : 1/12 , find a : b : c. a:b=2:1 and b:c=3:2 Let a=2b and c=2/3b a : b : c =2b:b:2/3b =2:1:2/3 =6:3:2
其他解答:
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