Tìm x : a) X + 3 785 = 9 600 b) 48 x X = 2 496

 

X = 9600 - 3785

X  = 5815

b) 48 x X = 2 496

X = 2496 : 48

X = 52

c) X - 7 486 = 10 253

X = 10 253 + 7486

X = 17 739