Question

[ (b-8000):50+900]:250=4

Answer 1

notam paranteza mica cu a si avem
a/50+900=4*250
a/50=1000-900
a/50=100
a=100*50
a=5000
b-8000=5000
b=13000

Answer 2

(b-8000) : 50 +900=4×250
(b-8000):50+900=1000
(b-8000):50=1000-900
(b-8000):50=100
b-8000=50×100
b-8000=5000
b=8000+5000
b=13000