Digital PSAT Math Practice Question 74: Answer and Explanation
Question: 74
What is the value of x in this pair of equations?
- A. -20
- B.
- C.
- D.
Correct Answer: B
Explanation:
(B) First, let's distribute the 4 in the second equation:
Next, notice that if you multiplied the first equation by 8, the y-terms (and in fact the entire left-hand side of both equations) would be the same:
You could subtract the second equation from the first to cancel the y-terms:
Add 5 to both sides:
Now divide by 6 to solve for x:
This is choice (B).
Test Information
- Use your browser's back button to return to your test results.
- Do more Digital PSAT Math Tests tests.
More Tests
- Digital PSAT Math Practice Test 1
- Digital PSAT Math Practice Test 2
- Digital PSAT Math Practice Test 3
- Digital PSAT Math Practice Test 4
- Digital PSAT Math Practice Test 5
- Digital PSAT Math Practice Test 6
- Digital PSAT Math Practice Test 7
- Digital PSAT Math Practice Test 8
- Digital PSAT Math Practice Test 9
- Digital PSAT Math Practice Test 10
- Digital PSAT Math Practice Test 11
- Digital PSAT Math Practice Test 12
- Digital PSAT Math Practice Test 13
- Digital PSAT Math Practice Test 14
- Digital PSAT Math Practice Test 15