Ответ:
O‘xshash hadlarni birlashtiramiz: \(5x-2x=3x\). Demak, \(5x+4-2x=3x+4\).
O‘zgaruvchili va sonli hadlarni alohida qo‘shamiz: \(3k+9k=12k\), \(9+4=13\). Demak, \(9+3k+4+9k=12k+13\).
O‘zgaruvchili hadlarni birlashtiramiz: \(10j-2j-j=7j\). Demak, \(10j-2j-8-j=7j-8\).
O‘xshash hadlarni birlashtiramiz: \(15h-4h=11h\), \(4-4=0\). Demak, \(15h+4-4h-4=11h\).
Javob: a) \(3x+4\); b) \(12k+13\); c) \(7j-8\); d) \(11h\).
