If a+c=13 and b-c=6, then a+b=?A、7B、13C、19D、22E、26CThe correct answer is C.

游客2025-02-24 21

问题 If a+c=13 and b-c=6, then a+b=?

选项 A、7
B、13
C、19
D、22
E、26

答案 C

解析 The correct answer is C. Given that a+c=13 and b-c=6, the quantity a+b can be determined by substitution. If a+c=13, then c=13-a. Substituting c=13-a into o-c=6 yields the following:
b-(13-a)=6
b-13+a=6
b+a=6+13
a+b=19

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If a+c=13 and b-c=6, then a+b=?A、7B、13C、19D、22E、26CThe correct answer is C.

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