x-5x9=145
x-45=145
x =145+45
x =190
999+x=1999
x=1999-999
x=1000
X - 5 x 9 = 145
X - 45 = 145
X = 145 + 45
X = 190
999 + X = 1999
X = 1999 - 999
X = 1000
X - 5 x 9 = 145
X - 45 = 145
X = 145 + 45
X = 190
999 + X = 1999
X = 1999 - 999
X = 1000
\(x-5\times9=145\)
\(x-45=145\)
\(x=145-45\)
\(x=100\)
\(999+x=1999\)
\(x=1999-999\)
\(x=1000\)
Tíck cho mình nha
x - 5 x 9 = 145
x - 45 = 145
x = 145 + 45
x = 190
999 + x = 1999
x = 1999 - 999
x = 1000
999+x=1999
x=1999-999
x=1000
Vậy x=1000
x-5*9=145
x-45=145
x=145+45
x=190
999+x=1999
x=1999-999
x=1000