Răspuns :
[tex](x \div 2 + 250 \div 5) \div 5 = 12[/tex]
[tex]x \div 2 + 50 = 12 \times 5[/tex]
[tex]x \div 2 + 50 = 60[/tex]
[tex]x \div 2 = 60 - 50[/tex]
[tex]x \div 2 = 10[/tex]
[tex]x = 10 \times 2[/tex]
[tex]x = 20[/tex]
[tex]x \div 2 + 50 = 12 \times 5[/tex]
[tex]x \div 2 + 50 = 60[/tex]
[tex]x \div 2 = 60 - 50[/tex]
[tex]x \div 2 = 10[/tex]
[tex]x = 10 \times 2[/tex]
[tex]x = 20[/tex]
(x : 2 + 250 : 5) : 5 = 12
( B + 50 ) : 5 = 12
A : 5 = 12
A = 12 × 5
A = 60
B + 50 = 60
B = 60 - 50
B = 10
x : 2 = 10
x = 10 × 2
x = 20
( B + 50 ) : 5 = 12
A : 5 = 12
A = 12 × 5
A = 60
B + 50 = 60
B = 60 - 50
B = 10
x : 2 = 10
x = 10 × 2
x = 20