Răspuns:
[tex](y \div 2) \div 4 \times 10 - 10 = 60[/tex]
[tex](y \div 2) \div 4 \times 10 = y - 10 = 60 = > 60 + 10 = y = 70[/tex]
[tex](y \div 2) \div 4 \times 10 = 70[/tex]
[tex](y \div 2) \div 4 = y \times 10 = 70 = > y = 70 \div 10 = 7[/tex]
[tex](y \div 2) \div 4 = 7[/tex]
[tex]y \div 2 = y \div 4 = 7 = > y = 4 \times 7 = 28[/tex]
[tex]y \div 2 = 28[/tex]
[tex]y = 2 \times 28[/tex]
[tex]y = 56[/tex]