Mathematical Reasoning第 56 / 120 题
Which value of x makes the equation 2x = 5x − 12 true?
a.2
b.3
c.6
d.4
解析
Subtract 2x from both sides to get 0 = 3x − 12, then add 12 and divide by 3 to find x = 4. Gathering variables on one side isolates x. Checking: 2(4) = 8 and 5(4) − 12 = 8, which matches.
免费刷完整 120 道题库 — 无需注册。
同考点相关题目
- If 5 pencils cost $1.25, how much do 8 pencils cost at the same rate?
- What is the value of the expression -4 + 9 − 3?
- A square has a perimeter of 36 cm. What is the length of one side?
- The temperature rose from -5°F to 12°F. By how many degrees did it rise?
- What is 3/5 + 1/5?
- A phone plan costs $30 per month plus $0.10 per text. Which expression gives the total monthly cost for t texts?