Question

2. Determinati numărul x din:
a) 3x + 36 =72.
b) 5x - 175 = 120.
c) 65 - 13x = 4 225.
d) 5x: 36 = 8200;
e) 23. X = 2 323.
f) 4 225 : (13x) = 65.​

Answer 1

Răspuns:

a. 3x+36=72

3x=72-36

3x=36

x=36:3

x=12

b. 5x-175=120

5x=120+175

5x=295

x=295:5

x=59

c. 65-13x=4225

13x=4225+65

13x=4290

x=4290:13

x=330(aici nu sunt foarte sigură)

d. 5x:36=8200

5x=8200*36

5x=295200

x=295200:5

x=59040

e. 23x=2323

x=2323:23

x=101

f. 4225:(13x)=65

13x=4225:65

13x=65

x=65:13

x=5

Answer 2

3x+36=72

3x=72-36

3x=36

x=12

5x-175=120

5x=120+175

5x=295

x=59

65-13x=4225

-13x=4225-65

-13x=4160

x=-320

23×x=2323

23x:23= 2323:23

x=2323:23

x=101

4225:(13x)=65

4225:(13x)=65, x = taiat 0

4225 supra 13x=65

325 supra x=65

325=65x

65x=325

x=5