MediumMath· Advanced Math· Nonlinear equations in one variable and systems of equations in two variables· SPR
If one solution to the system of equations above is , what is one possible value of x ?
Correct answer: 8 or 9
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Explanation
The correct answer is either 8 or 9. The first equation can be rewritten as . Substituting for y in the second equation gives . By applying the distributive property, this can be rewritten as . Subtracting 72 from both sides of the equation yields . Factoring the left-hand side of this equation yields . Applying the Zero Product Property, it follows that and . Solving each equation for x yields and respectively. Note that 8 and 9 are examples of ways to enter a correct answer.
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id cb_question_bank:9efbeae5-8e99-4366-a2a0-ed3555c3a34b · question 364a2d25 · IBN 070619-DC
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