Question

Aflati x din:

a) (12+x)+4=4 ori x-4
b) (3 ori x+2):-2=3
c) [(x+3) ori 3+3] ori 3+3=102
d) 5 ori x : 2=2525

Answer 1

Răspuns:

Explicație pas cu pas:

a) (12+x)+4=4*x-4

12 + x + 4 = 4*x - 4

4*x - x = 12 + 4 + 4

3*x = 20

x = 20/3

b) (3*x+2) : -2 = 3

3*x + 2 = 3*(-2) = -6

3*x = -6 - 2 = -8

x = -8/3

c) [(x+3)*3+3]*3+3=102

(3*x + 9 + 3)*3 + 3 = 102

(3*x + 12)*3 = 102 - 3 = 99

3*x + 12 = 99 : 3 = 33

3*x = 33 - 12 = 21

x = 21 : 3 = 7

d) 5*x : 2=2525

5*x = 2*2525 = 5050

x = 5050 : 5 = 1010