Question

Alfa numarul necunoscut si verifica : A. 24+5 X a +62=126 B, (55 X 7842+680) X+ 550=b C. (729+x):2=870 D.([b-8000):50+900]:250=4 Ajutați-mă va rog

Answer 1

24+5 X a +62=126
86+5 X a =126
5 X a =126-86
5 X a =40
a=40:5
a=8





(729+x):2=870
729+x=870x2
729+x=1740
x=1740-729
x=1011



[(b-8000):50+900]:250=4
(b-8000):50+900=4x250
(b-8000):50+900=1000
(b-8000):50=1000-900
(b-8000):50=100
b-8000=100x50
b-800=500
b=500+800
b=1300




(55 X 7842+680) X+ 550=b
(431310+680) X+ 550=b
431990 X+ 550=b

aici ceva lipseste cand imi raspunzi iti complectez

Answer 2

24+5 X a +62=126 86+5 X a =126 5 X a =126-86 5 X a =40 a=40:5 a=8 (729+x):2=870 729+x=870x2 729+x=1740 x=1740-729 x=1011 [(b-8000):50+900]:250=4 (b-8000):50+900=4x250 (b-8000):50+900=1000 (b-8000):50=1000-900 (b-8000):50=100 b-8000=100x50 b-800=500 b=500+800 b=1300