Rezolvați ecuatiile: VA ROOG (URGEEEEENT) FIETI-VA MILA VA ROG FRUMOS DAU COROANA

Răspuns
Explicație pas cu pas:
b) 5 x - 7 = 63 ⇒ 5 x = 63 + 7 ⇒ 5 x = 70 ⇒ x = 70 : 5 ⇒ x = 14
c) 116 - 5 x = 26
5 x = 116 - 26
5 x = 90
x = 90 : 5
x = 18
________
e) 4 x + 5 = 33
4 x = 33 - 5
4 x = 28
x = 28 : 4
x = 7
____________
f) 13 x - 5 = 60
13 x = 60 + 5
13 x = 65
x = 65 : 13
x = 5
_____________
h) 21 + 5 x = 226
5 x = 226 - 21
5 x = 205
x = 205 : 5
x = 41
____________
i) 3 x + 7 = 40
3 x = 40 - 7
3 x = 33
x = 33 : 3
x = 11
____________
k ) 824 - 21 x = 47
21 x = 824 - 47
21 x = 777
x = 777 : 21
x = 37
_____________
l) 34 + 3 x = 427
3 x = 427 - 34
3 x = 393
x = 393 : 3
x = 131
____________
n) 14 x - 5 = 37
14 x = 37 + 5
14 x = 42
x = 42 : 14
x = 3
_________
o) 947 - 13 x = 37
13 x = 947 - 37
13 x = 910
x = 910 : 13
x = 70
___________
r) 29 x + 31 = 930
29 x = 930 - 31
29 x = 899
x = 899 : 29
x = 31