A) 19 + 68 + ( X – 19 ) = 105 B) 2 X X + 7 X X = 9009

bài 1: - DE THI HSG TOAN TV 4 CO DAP AN
Toán DE THI HSG TOAN TV 4 CO DAP AN
Bài 1: Tìm x: a) 19 + 68 + ( x – 19 ) = 105 b) 2 x

x

+ 7 x

x

= 9009