Addition of trinomials — task. Mathematics CBSE, Class 7.

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Add the following trinomials and select the correct answer.

The sum of

\begin{array}{l} 3 a - 5 b - 8 c; \\ 2 a + 7 b - 3 c \end{array}

and

5 a - 11 b + c

is...

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8. Addition of trinomials