作业帮【英语数学题】很诡异的sat代数题,算的结果和答案不一致The first of three number is 3 times the second number.The third number is 30 more than the second number.If the third number is represented by t and the sum of the first and
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【英语数学题】很诡异的sat代数题,算的结果和答案不一致The first of three number is 3 times the second number.The third number is 30 more than the second number.If the third number is represented by t and the sum of the first and
【英语数学题】很诡异的sat代数题,算的结果和答案不一致
The first of three number is 3 times the second number.The third number is 30 more than the second number.If the third number is represented by t and the sum of the first and second numbers is 180,which of the following equations could be used to find the value of
我的计算过程如下：设3 个数为x ,y,t
x=3y
t=30+y
x+y=180
由上得3y+y=180
y=45
代入t,t=75
答案给的是3(t-30)+(t+30)=180,为什么把t=75代入后不满足式子?我哪里算错了?求指教.
【英语数学题】很诡异的sat代数题,算的结果和答案不一致The first of three number is 3 times the second number.The third number is 30 more than the second number.If the third number is represented by t and the sum of the first and
答案错了,应该是3(t-30)+(t-30)=180
正确答案肯定是3(t-30)+(t-30)=180
意思是第一个数和第二个数的和是180，第二个数比第三个数小30，所以是t-30，第一个数是第二个数的三倍，所以是3(t-30)。关键是我的计算没有问题啊。
为什么答案和结果不一致呢？我不是说正确答案是3(t-30)+(t-30)=180么……
我这么早就给你解释了，你都不采纳！...
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正确答案肯定是3(t-30)+(t-30)=180
意思是第一个数和第二个数的和是180，第二个数比第三个数小30，所以是t-30，第一个数是第二个数的三倍，所以是3(t-30)。
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