Question

X x 9 - X x 2 = 41 + 22.

Answer 1

` x xx 9 - x xx 2 = 41 + 22`

` x xx 9 - x xx 2 =63`

`x xx ( 9 -2) = 63`

`x xx 7 = 63`

`x 63 : 7`

`x=9`

Answer 2

`x xx 9 - x xx 2 = 41 + 22`

`x xx (9 - 2) = 63`

`x xx 7 = 63`

`x = 63 : 7`

`x = 9`

Answer 3

\(x . 9 - x. 2 = 41 + 22\)

\(x . 9 - x. 2 = 63\)

\(x . (9- 2) = 63\)

\(x.7=63\)

\(x=63:7=9\)

Answer 4

$X\times 9-\mathrm{X\; \times }2=41+22$

$\mathrm{X\; \times }9-\mathrm{X\; \times }2=63$

$\mathrm{X\; \times }(9-2)=63$

$X\times 7=63$

$X.63:7$

$X=9$

Vậy ..............