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Systems of two linear equations in two variables SAT question
Math · Algebra · Medium · Answer it here, explanation included.
The solution to the given system of equations is . What is the value of ?
Enter a number or fraction (like 3/17 or 0.176). Press Enter to check.
ExplanationShow
The correct answer is . It's given by the second equation in the system that . Substituting for in the first equation in the system, , yields . Subtracting from both sides of this equation yields .
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