1.

Plz answer fast.......​

Answer»

Step-by-step explanation:

(a) 5x+7X-5x

12x-5x

7x

(b) 6m2-5m2+3n-8n

m2 -5N

(c)X- 3y+y-2y+4z-8z-3z-m+5n

x- 4y-7z-m+5n



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