Question

AFLA NR NECUNOSCUT; A) 6866 +{36*24-[62:(3*A+7) +653]} *15 =10001

Answer 1

6866 +{36*24-[62:(3*A+7) +653]} *15 =10001
6866+[864 - 62/3a+7 +653]×15= 10001
6866+(221- 62/3a+7) ×15= 10001
6866+3165- 930/3a+7= 10001
10031-930/3a+7= 10001
-930/3a+7= 10001-10031
-930/3a+7= -30
-30(3a+7)= -930
3a+7 = -930:(-30)
3a +7= 31
3a= 31-7
3a= 27
a= 27:3
a=8