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Sturzuandreea1752
a fost răspuns

Calculeaza numarul natural x din egalitati:
a) 4•(x-2) -14=50
b) 25-3•(2x + 1) =10
c) [7+3(6x-1]:40+9=10
d) 12•2+x•[7+2•(4+1)]= 58

Răspuns :

Jojoi54

Răspuns:

4•(x-2) -14=50

4•(x-2)=50+14

4•(x-2)=64

(x-2)=64:4

x-2=16

x=16+2

x=18

25-3•(2x + 1) =10

3•(2x+1)=25-10

3•(2x+1)=15

(2x+1)=15:3

2x+1=5

2x=5-1

2x=4

x=4:2

x=2

[7+3•(6x-1)]:40+9=10

[7+3•(6x-1)]:40=10-9

[7+3•(6x-1)]:40=1

[7+3•(6x-1)]=1×40

7+3•(6x-1)=40

3•(6x-1)=40-7

3•(6x-1)=33

(6x-1)=33:3

6x-1=11

6x=11+1

6x=12

x=12:6

x=2

12•2+x•[7+2•(4+1)]= 58

24+x•(7+2×5)=58

24+x•(7+10)=58

24+x•17=58

x•17=58-24

x•17=34

x=34:17

x=2

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