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1. (10x2 + 2x*+8 +7x>) + (2x2 + x - 1) (5points)​

Sagot :

Answer:

10 x + 31

Step-by-step explanation:

(10 * 2 + 2 x + 8 + 7 x) + (2 * 2 + x - 1)

= 10 x + 31