Question

va rog sa ma ajutati urgent !!!! va rog!!!! plis plis plis,!!!!!!!!

Answer 1

a)

25 + a : ( 20 + 4 × 28 - 4 ) = 39

a : ( 20 + 112 - 4 ) = 39 - 25

a : ( 132 - 4 ) = 14

a : 128 = 14

a = 14 × 128

a = 1 792

____________________________

b)

52 × 5 + b = 124 × 3 + 25 × 4

260 + b = 372 + 100

260 + b = 472

b = 472 - 260

b = 212

_____________________

c)

20 + 3 × 12 + c + ???? Lipseste termenul = 148

Obs. Vom rezolva exercitiul fara acel termen lipsa !

20 + 3 × 12 + c = 148

20 + 36 + c = 148

56 + c = 148

c = 148 - 56

c = 92

__________________

d)

d - 2 × ( 480 × 2 - 90 : 10 ) + 5 = 75

d - 2 × ( 960 - 9 ) = 75 - 5

d - 2 × 951  = 70

d - 1 902 = 70

d = 70 + 1 902

d = 1 972