Question

Aflati x din: a)(12+x)+14=4•x-4
b)(3•x+2):4-2=3
c)[(x+3)•3+3]•3+3=102
d)5•x:2=2525​

Answer 1

Răspuns:

d) 5 • x : 2 = 2525

5 • x = 2525 • 2

5 • x = 5050

x = 5050 : 5

x = 1010

b) ( 3 • x + 2 ) : 4 - 2 = 3

( 3 • x + 2 ) : 4 = 3 + 2

( 3 • x + 2 ) : 4 = 5

3 • x + 2 = 5 × 4

3 • x + 2 = 20

3 • x = 20 - 2

3 • x = 18

x = 18 : 3

x = 6

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

[ ( x + 3 ) • 3 + 3 ] • 3 = 102 - 3

[ ( x + 3 ) • 3 + 3 ] • 3 = 99

( x + 3 ) • 3 + 3 = 99 : 3

( x + 3 ) • 3 + 3 = 33

( x + 3 ) • 3 = 33 - 3

( x + 3 ) • 3 = 30

x + 3 = 30 : 3

x + 3 = 10

x = 10 - 3

x = 7

La punctul a numai am timp