Explicație pas cu pas:
a) m + 7 x 4 =42
m + 28 = 42
m = 42 -28
m = 14
b) n - 3 x 8 =24
n - 24 = 24
n = 24 + 24
n = 48
c) 9 x 8 - p =12
72 - p = 12
p = 72 - 12
p = 60
d) q - ( 100 - 93) x 7 =40
q - 7×7 = 40
q - 49 = 40
q = 49 + 40
q = 89
e) 8 x 7 + 7 x 2 - r =25
56 + 14 - r = 25
r = 70 - 25
r = 45
f) (18+16:2+14):t =5
(18 + 8 + 14) : t = 5
40 : t = 5
t = 40 : 5
t = 8
