9x+(2y-5x) (5x-7a)+5a (2a+5b)-7b 6p-(5p-3a)

Question

9x+(2y-5x)

(5x-7a)+5a

(2a+5b)-7b

6p-(5p-3a)

Answer 1

9х+(2у-5х)= 9х+2у-5х= 4х+2у
(5х-7а)+5а=  5х-7а+5а= 5х-2а
(2а+5b)-7b=  2а+5b-7b= 2а-2b
6р-(5р-3а)=  6р-5р+3а= р+3а