X + 987 = 1890
X = 1890 - 987
X = 903
X x 5 = 125
X = 125 : 5
X = 25
X + 978 = 1890
x = 1890 -978
x = 903
X x 5 = 125
x = 125 : 5
x = 25
tk cho mk nhé
x + 987 = 1890
x = 1890 - 987
x = 903
x . 5 = 125
x = 125 : 5
x = 25
x + 987 = 1890
x = 1890 - 987
x = 903
x × 5 = 125
x = 125 : 5
x = 25
1)x + 987 = 1890
x = 1890 - 987
x = 903
2) x x 5 = 125
x= 125 : 5
x= 25
x + 987 = 1890
x = 1890 - 987
x = 903.
x \(\times\) 5 = 125
x = 125 \(\div\)5
x = 25.
Ai k mk,mk k lại!
X + 987 = 1890
X = 1890 - 987
X = 903
X x 5 = 125
X = 125 : 5
X = 25