Question

10×[1+6×(4+a:4)]=310
760-(b:8+136-97)×5=0
1+[2×(1+c)-59]×9=10
[120-(4×d)×3:6]:8=10
[38+(106-e):9]:8=5

Dau coroana
Pls

Answer 1

10×[1+6×(4+a:4)]=310
1+6×(4+a:4)=310:10
1+6×(4+a:4)=31
6×(4+a:4)=31-1
6×(4+a:4)=30
4+a:4=30:6
4+a:4=5
a:4=5-4
a:4=1
a=1×4
a=4


760-(b:8+136-97)×5=0
(b:8+39)×5=760
b:8+39=760:5
b:8+39=152
b:8=152-39
b:8=113
b=113×8
b=904



1+[2×(1+c)-59]×9=10
[2×(1+c)-59]×9=10-1
[2×(1+c)-59]×9=9
2×(1+c)-59=9:9
2×(1+c)-59=1
2×(1+c)=1+59
2×(1+c)=60
1+c=60:2
1+c=30
c=30-1
c=29



[120-(4×d)×3:6]:8=10
120-(4×d)×3:6=10×8
120-(4×d)×3:6=80
(4×d)×3:6=120-80
(4×d)×3:6=40
(4×d)×3=40×6
(4×d)×3=240
4×d=240:3
4×d=80
d=80:4
d=20


[38+(106-e):9]:8=5
38+(106-e):9=5×8
38+(106-e):9=40
(106-e):9=40-38
(106-e):9=2
106-e=2×9
106-e=18
e=106-18
e=88