Add 9x 3x And 4x

Add : (i)- 9x, 3x and 4x (ii) 23y2, 8y2 and – 12y2 (iii) 18pq – 15pq and 3pq

Answers:

(i) – 9x + 3x + 4x

= -9x + 7x = -2x

(ii) 23y2 + 8y2 – 12y2

= 31y2 – 12y2 = 19y2

(iii) 18pq – 15pq + 3pq

= 18pq + 3pq – 15pq = 21pq – 15pq = 6pq