X+6=20 so what must X represent to get blank plus 6=20??

hi ! x must represent 14 in order for x+6 = 20

if we insert the x which would be 14 it would be 14+6=20 :))

B) m = 90 – 6d

Step-by-step explanation:

If she memorizes 18 new measures for every 3 days, then she memorizes

for each day in average.

ıf d=the number of days of practice since she began learning the piece, then she memorizes 6×d (6d) measures each day.

Then, the number of measures Harita still needs to memorize, as a function of d can be stated as:

90-6d