sat suite question viewer
The solution to the given system of equations is . What is the value of ?
Explanation
The correct answer is . Subtracting the second equation in the given system from the first equation yields , which is equivalent to , or . Dividing each side of this equation by yields . Substituting for in the second equation yields . Adding to both sides of this equation yields .
Alternate approach: Multiplying each side of the second equation in the given system by yields . Subtracting the first equation in the given system from this equation yields , which is equivalent to , or . Dividing each side of this equation by yields .