Question

Află numerele necunoscute a)a+34:2+28:14=44 b)65:5+a×2-39:13=78

Answer 1

a)a+34:2+28:14=44

  a+17+2=44

  a+19=44

 a=25

b) 65:5+a×2-39:13=78

    13+2a-3=78

    10+2a=78

     2a=68

    a=34

Answer 2

Răspuns:

$a) \: a + 34 \div 2 + 28 \div 14 = 44 \\ a + 17 + 2 = 44 \\ a + 19 = 44 \\ a = 44 - 19 \\ \bf \red{ a = 25}$

$b) \: 65 \div 5 + 2a - 39 \div 13 = 78 \\ 13 + 2a - 3 = 78 \\ 10 + 2a = 78 \\ 2a = 78 - 10 \\ 2a = 68 \\ a = 68 \div 2 \\ \bf \purple{a = 34}$