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Algebra Difficulty 1.4 Junior Find the answer Canada

If $p+q+r=19$ and $p+r=8$ , then the value of $q$ is

Pick one

Solution

Since $p+q+r=p+r+q=19$ and
$p+r=8$ , then $8+q=19$ and so $q=19-8=11$ .

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Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project.