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Mathematics(QUICK......)help....
發問:
When z is devided by 7 and then 5 is added to it,the result is 18.find z. there are (4)$10 conis and (y)$2 inside a bag. If the value of the bag is $58,find y. David bought (11) ball pens for $12 each and (y)pencils for $7 each.If David paid $237 in total,find y. 更新: The sum of three consecutive even numbers is 60. find the THREE numbers. The sum of three consecutive odd number os 105.Find the THREE numbers The sum of three consecutive numbers minus 4 times the smallest number eqals 1. Find the THREE numbers.
最佳解答:
z/7+5=18 z/7=13 z=91 4*10+2y=58 2y=18 y=9 11*12+7y=237 7y=105 y=15 Let x be the first even number x+x+2+x+4=60 3x=54 x=18 The three numbers are 18,20,22 Let x be the first odd number x+x+2+x+4=105 3x=99 x=33 The three numbers are33,35,37 Let x be the first number x+x+1+x+2-4x=1 -x=-2 x=2 The three numbers are 2,3,4
其他解答:
1)z/7+5=18 z=91 2)4*10+y*2=58 y*2=18 y=9 3)11*12+y*7=237 7y=105 y=15 4)let x be the smallest of the three consecutive number x+(x+2)+(x+4)=60 3x=54 x=18 So the three consecutive numbers are 18,20and22 5同6都係好似上面咁做|||||1) z/7 +5= 18 z=91 2)40+2y=58 y=9 3) 132+7y=237 y=15 LET y be the first consercutive number y+ y+2 + y + 4= 60 3y=54 y=18 So three numbers is 18, 20, 22 LET y be the first consercutive number y+ y+2 + y + 4= 105 3y=99 y=33 So the three numbers is 33 35 37 LET z be the first consercutive number Z+ Z+2 + z+4 - 4z=1 3z-4z=-5 z=5|||||1) (z/7)+5=18 z/7=13 z=13*7 z=91 2) (4*$10)+(y*$2)= $58 $40+2y=$58 2y=$18 y=9 3) (11*$12)+7y=$237 $132+7y=$237 7y=$105 y=15
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