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各位知識朋友 , 入黎幫我手 ar !!! ( 數學F.1 ) (28)
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各位知識朋友 , 入黎幫我手 ar !!!我有幾條數學問題唔識 , 幫手解答 ar( 數學F.1 )!!!!!!!!!!!!!!!( 要步驟 )1.When the sum of 2 times a number and 6 is divided by 3, the result is 12. Find the number.2. 20 minus the product of a number and 2 is equal to the square of 4.Find the number.3. The sum of three consecutive numbers is 54. Find the... 顯示更多 各位知識朋友 , 入黎幫我手 ar !!! 我有幾條數學問題唔識 , 幫手解答 ar( 數學F.1 )!!!!!!!!!!!!!!!( 要步驟 ) 1.When the sum of 2 times a number and 6 is divided by 3, the result is 12. Find the number. 2. 20 minus the product of a number and 2 is equal to the square of 4. Find the number. 3. The sum of three consecutive numbers is 54. Find the three numbers. 4.T he sum of three consecutive even numbers is 42. Find the three numbers. 更新: a26697933 , 咪玩野下 !
最佳解答:
1. Let the number be y, (2 x y) + (6 / 3) = 12 2y + 2 = 12 2y = 10 y = 5 2. Let the number be y, 20 - (y x 2) = 4 sqaure 20 - 2y = 16 2y = 4 y = 2 3. Let the first number is y, y + (y+1) + (y+1+1) = 54 y + y + 1 + y + 1 + 1 = 54 3y + 3 = 54 3y = 51 y = 17 so, the three consecutive numbers are 17, 18 and 19 4. Let y the first even number, y + (y+2) + (y+2+2) = 42 y + y + 2 + y +2 + 2 = 42 3y + 6 = 42 3y = 36 y = 12 so, the three consectuive even numbers are 12, 14 and 16
其他解答:
1. 當2 次的總和數字和6 由3 劃分, 結果是12 。 看到數字。 2. 20 減數字的產品和2 與正方形是相等的4 。 看到數字。 3. 三個連貫數字的總和是54 。看到三個數字。 他求和三個連貫偶數的4.T 是42 。看到三個數字|||||Let x be the number. 2x+(6over3)=12 2x+2=12 2x=10 x=5 So,the number is 5. Let x be the number. 20-2x=4^2 20-16=2x 4=2x x=2 So,the numder is 2. Let x be the smallest number. x+(x+1)+(x+2)=54 3x+3=54 3x=51 x=17 So,the three numbers are 17, 18, 19 . Let x be the smallest number. x+(x+2)+(x+4)=42 3x+6=42 3x=36 x=12 So,the three numbers are 12 , 14 , 16 .|||||1. Let x be the number (2x + 6) /3 = 12 2x + 6 = 36 2x = 30 x = 15 2. Let x be the number 20 - 2x = 4^2 20 - 2x = 16 2x = 4 x = 2 3. Let the 3 numbers be x, x+1 and x+2, x + (x+1) +(x+2) = 54 3x + 3 = 54 3x = 51 x = 17 so the 3 numbers are: 17, 18 and 19 4. Let the 3 numbers be x, x+2 and x+4 x + (x+2) + (x+4) = 42 3x + 6 = 42 3x = 36 x = 12 so the 3 number are 12, 14 and 16|||||1.When the sum of 2 times a number and 6 is divided by 3, the result is 12. Find the number. let x be the number (2x+6)/3=12 2x+6=36 2x=30 x=15 2. 20 minus the product of a number and 2 is equal to the square of 4. Find the number. Let x be the number 20-2x=4^2 20-16=2x 4=2x x=2 3. The sum of three consecutive numbers is 54. Find the three numbers. Let the three number is x , x+1 , x+2 x+x+1+x+2=54 3x+3=54 3x=51 x=17 4.T he sum of three consecutive even numbers is 42. Find the three numbers Let the three number is x,x+2,x+4 x+x+2+x+4=42 3x+6=42 3x=36 x=12
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