1.

Add: (i) 8x, 3x (ii) 7mn, 5mn (iii) -9y, 11y, 2y

Answer»

(i) 8x + 3x = (8 + 3)x = 11x 

(ii) 7mn + 5mn = (7 + 5)mn = 12mn 

(iii) -9y + 11y + 2y = (-9 + 11 + 2 )y = (2 + 2)y = 4y



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