Question

a,   x  X 2,1 = 4,03 + 5                                     b, 3,45  X x  = 13 - 3,34

lưu ý x hoa là nhân

.................................................................................................................................................................................................................................................................................................................................................................................................

Answer 1

a: =>2,1x=9,03

hay x=4,3

b: =>3,45x=9,66

nên x=2,8