alleryStart learning →To test whether an ordered pair solves a system, substitute its values into:
AEach equation
BEvery envelope
CEither engineer
DAny newspaper
Answer & Solution
Correct answer: A. Each equation
1. A pair that works in only one equation is not a solution to the system.
2. Both equations have to be checked before any verdict.
3. Substitute the values of the variables into each equation.
4. So the substitution goes into each equation.
_Source: OpenStax Elementary Algebra 2e (CC BY 4.0), Ch 5 'Systems of Linear Equations', sections 5.1-5.3_
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