Question

Ajutatima 23 puncte
(168-a) :5=12
(236-a)x10=1.800
1973-426:a=1.902
1706+ax13=2.031
967:(5a+1)=10 rest 7

20:ax35=700
16xa:8=32
a:19x6=144
a:13x9=819
16x12:a=6
(4b+3):47=19 rest 6

Answer 1

(168-a) :5=12
168-a=12×5
168-a=60
a=168-60
a=108

(236-a)x10=1.800
236-a=1800:10
236-a=180
a=236-180
a=56

1973-426:a=1.902
426:a=1973-1902
426:a=71
a=426:71
a=6

1706+a×13=2.031
a×13=2031-1706
a×13=325
a=325:13
a=25

967:(5a+1)=10 rest 7
5a+1=(967-7):10
5a+1=96
5a=96-1
5a=95
a=95:5
a=19

20:a×35=700
20:a=700:35
20:a=20
a=20:20
a=1

16×a:8=32
16×a=32×8
16×a=256
a=256:16
a=16

a:19x6=144
a:19=144:6
a:19=9
a=19×9
a=171

a:13x9=819
a:13=819:9
a:13=91
a=91:13
a=7

(4b+3):47=19 rest 6
4b+3=47×19+6
4b+3=899
4b=899-3
4b=896
b=896:4

Coronița?