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Sagot :
Answer:
[tex]-17s + 23[/tex]
Step-by-step explanation:
[tex] - 3(s - 10) + 7( - 2s - 1)[/tex]
[tex] - 3(s - 10) = - 3s - 3 \times ( - 10)[/tex]
[tex] - 3s + 30 + 7( - 2s - 1)[/tex]
[tex] - 3s + 30 - 14s - 7[/tex]
[tex] - 17s + 30 - 7[/tex]
[tex] \boxed{\green{= - 17s + 23}}[/tex]
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