请教三道数学题（英文的）(1) six less than a number is the same as five more than three times the number(2) four more than twice a number is seventeen(3) 15 less than the product of a number and 4 is equal to 3 times the sum of 8 and the n

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请教三道数学题（英文的）(1) six less than a number is the same as five more than three times the number(2) four more than twice a number is seventeen(3) 15 less than the product of a number and 4 is equal to 3 times the sum of 8 and the n
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请教三道数学题（英文的）(1) six less than a number is the same as five more than three times the number(2) four more than twice a number is seventeen(3) 15 less than the product of a number and 4 is equal to 3 times the sum of 8 and the n
请教三道数学题（英文的）
(1) six less than a number is the same as five more than three times the number
(2) four more than twice a number is seventeen
(3) 15 less than the product of a number and 4 is equal to 3 times the sum of 8 and the number
希望可以把题意和解题方法讲明白一点

请教三道数学题（英文的）(1) six less than a number is the same as five more than three times the number(2) four more than twice a number is seventeen(3) 15 less than the product of a number and 4 is equal to 3 times the sum of 8 and the n
（1）设此number为x,根据题意有如下方程：3x+5=x-6,x=-5.5
给你解释下第一题题意吧,方程的前部分,即six less than a number,意思是比某数少6,即x-6,等号即is the same as,方程的后部分,即five more than three times the number,即比这个数的3倍还多5,即3x+5.列出方程可解得x.
（2）同上,4+2x=17,x=6.5
（3）同上,(4+x)-15=3(8+x),x=-17.5

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