SAT数学备考经典模拟题训练2

>>SAT数学模拟题：SAT数学备考经典模拟题训练2

>>SAT考试辅导

Read the following SAT test question and then click on a button to select your answer.

ax+5=4x-3

In the linear equation shown above, a is a constant. If the equation has no solution, what is the value of a?

A.1

B.2

C.3

D.4

【答案解析】

答案：D

解析：

Choice D is correct. A linear equation in one variable will have no solution if the equation reduces to an equation of the form:

ax+b=cx+d,

where a=c and b≠d.

Therefore, if a=4, the equation 4x+5=4x-3 yields 5=-3. This is not true for any values of x and therefore this value of a results in an equation with no solutions.

上面的模拟题都做完了吗大家，做题后也要对照解析认真总结自己的不足之处哦。更多SAT数学模拟题可登录坦途网SAT考试频道找到，祝大家考试顺利！