Question

Tìm X biết:

a,151 - 2 x (X - 6) = 2227:17

b, 2/3 - 1/3 x X = 1/4

Answer 1

a) 

151 - 2 x ( x-6 ) = 2227 : 17

        2 x ( x-6 ) =   131

        2 x ( x-6 ) =  151 - 131

        2 x ( x-6 ) =    20

               x-6   = 20 : 2

               x - 6 =   10

               x     = 10 + 6

              x      =   16 

Answer 2

b) $\frac{\mathrm{\backslash (\backslash dfrac\{1\}\{3\}\backslash )\; x\; X\; =}}{}$

\(\dfrac{2}{3}-\dfrac{1}{4}=\dfrac{5}{12}\\ X=\dfrac{5}{12}:\dfrac{1}{3}=\dfrac{5}{4}\)

Answer 3

 

a, 151 - 2 x ( x-6 ) = 2227 : 17

    2 x ( x-6 ) =   131

    2 x ( x-6 ) =  151 - 131

    2 x ( x-6 ) =    20

    x-6   = 20 : 2

    x - 6 =   10

    x = 10 + 6

    x =  16 

Answer 4

b, 2/3 - 1/3 x X = 1/4

1/3 x X = 1/4 + 2/3

1/3 x X = ?

X = ? : 1/3

X = ?