PSAT Math Grid-Ins Question 25: Answer and Explanation
Question: 25
4s + 2t = 7
3s - 2t = 14
In the system of equations above, what is the value of s?
Correct Answer: 3
Explanation:
3
The question asks for the value of s in a system of equation. To find this, look for a way to eliminate the t terms. The t terms have the same coefficient with opposite signs, so stack and add the equations to make t disappear.
Divide both sides by 7 to get s = 3. The correct answer is 3.
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