Question

\(5.\left(x-1\right)+6.\left(x-2\right)=5\)

\(3.\left(x-2\right)+6.\left(x-1\right)=6\)

\(4.\left(x-2\right)+3.\left(x-8\right)=2.x+3\)

Answer 1

5.(x - 1) + 6.(x - 2) = 5

5x - 5 + 6x - 12 = 5

11x - 17 = 5

        11x = 5 + 17

         11x = 22

             x = 2

3.(x - 2) + 6.(x - 1) = 6

3x - 6 + 6x - 6 = 6

9x - 12 = 6

       9x = 6 + 12

       9x = 18

        x = 2

Answer 2

5 ( x - 1 ) + 6 ( x - 2 ) = 5

<=> 5x - 5 + 6x - 12 = 5

<=> 11x = 22

<=> x = 2 

Vậy x = 2 

Answer 3

3 ( x - 2 ) + 6 ( x - 1 ) = 6

<=> 3x - 6 + 6x - 6 = 6

<=> 9x = 18

<=> x = 18 : 9

<=> x = 2

Vậy ...

Answer 4

\(5\left(x-1\right)+6\left(x-2\right)=5\)

\(\Rightarrow5x-5+6x-12=5\)

\(\Rightarrow11x=22\Rightarrow x=2\)

Vậy x = 2

\(3\left(x-2\right)+6\left(x-1\right)=6\)

\(\Rightarrow3x-6+6x-6=6\)

\(\Rightarrow9x=18\Rightarrow x=2\)

Vậy x = 2

\(4\left(x-2\right)+3\left(x-8\right)=2x+3\)

\(\Rightarrow4x-8+3x-24=2x+3\)

\(\Rightarrow4x+3x-2x=3+8+24\)

\(\Rightarrow5x=35\Rightarrow x=7\)

Vậy x = 7

Answer 5

4 ( x - 2 ) + 3 ( x - 8 ) = 2x + 3

<=> 4x - 8 + 3x - 24 = 2x + 3

<=> 5x = 35

<=> x = 35 : 5

<=> x = 7

Vậy .....

Answer 6

\(4.\left(x-2\right)+3.\left(x-8\right)=2x+3\)

\(4x-8+3x-24=2x+3\)

\(7x-32=2x+3\)

\(7x-2x=3+32\)

\(5x=35\)

\(x=\frac{35}{5}\)

\(x=7\)

Vậy \(x=7\)

Tham khảo nhé~

Answer 7

a, 5x - 5 + 6x - 12 = 5 

11x = 22 

x = 2

b, 3x - 6 + 6x - 6 = 6 

9x = 18 

x= 2 

c, 4x-8+ 3x-24 = 2x + 3 

4x + 3x - 2x = 3 +8 + 24 

5x = 35

x=7