Question

930:(a-13)=9 rest 3 va rog frumos sa ma ajutati!!!!

Answer 1

930 = 9 inmultit cu (a - 13) + 3
930 = 9a - 117 +3 => 930 = 9a - 114 => 9a = 930 + 114 = 1044=> a = 1044 : 9
a=116

Answer 2

930/[a-13]=9 rest 3;
⇒a-13=[930-3]/9
⇒a-13=927/9
⇒a-13=103
⇒a=13+103
⇒a=116;