PSAT Math Grid-Ins Question 34: Answer and Explanation
Question: 34
5x - 3y = 7
2x + y = 5
If (x, y) is the solution to the system of equations above, what is the value of y?
Correct Answer: 1
Explanation:
1
The question asks for the value of y in a system of equations, so solve the system for y. Look to eliminate the x terms by making the coefficients on x in the two equations the same but with opposite signs. Multiply the first equation by 2 to get 10x - 6y = 14, and multiply the second equation by -5 to get -10x - 5y = -25. Stack and add the equations.
img src="https://img.crackpsat.net/psat/pr/Page_111_Image_0004.jpg" />
Divide both sides by -11 to get y = 1. The correct answer is 1.
Test Information
- Use your browser's back button to return to your test results.
- Do more Math Grid-Ins Tests tests.
More Tests
- PSAT Math Grid-Ins Test 1
- PSAT Math Grid-Ins Test 2
- PSAT Math Grid-Ins Test 3
- PSAT Math Grid-Ins Test 4
- PSAT Math Grid-Ins Test 5
- PSAT Math Grid-Ins Test 6
- PSAT Math Grid-Ins Test 7
- PSAT Math Grid-Ins Test 8
- PSAT Math Grid-Ins Test 9
- PSAT Math Grid-Ins Test 10
- PSAT Math Grid-Ins Test 11
- PSAT Math Grid-Ins Test 12