Question

5.(x-6)-2.(x+3)=12

 

 

 

2.(x-5)-3(x+7)=14

Answer 1

\(5.\left(x-6\right)-2.\left(x+3\right)=12\)

           \(5x-30-2x-6=12\)

                              \(3x-36=12\)

                                         \(3x=12+36\)

                                         \(3x=48\)

                                            \(x=16\)

\(2.\left(x-5\right)-3.\left(x+7\right)=14\)

        \(2x-10-3x-21=14\)

                            \(-x-31=14\)

                                           \(x=-31-14\)

                                           \(x=-45\)

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Answer 2

Ta có : 5(x - 6) - 2(x + 3) = 12

<=> 5x - 30 - 2x + 6 = 12

<=> 3x - 24 = 12

=> 3x = 12 + 24

=> 3x = 36

=> x = 36 : 3

=> x = 12

Answer 3

\(a.\Leftrightarrow5x-30-2x-6=12\)

\(\Leftrightarrow5x-2x=12+30+6\)

\(\Leftrightarrow3x=48\)

\(\Rightarrow x=\frac{48}{3}=16\)

Vậy \(x=16\)

\(b.\Leftrightarrow2x-10-3x-21=14\)

\(\Leftrightarrow2x-3x=14+10+21\)

\(\Leftrightarrow-x=45\)

\(\Rightarrow x=45\)

Vậy \(x=45.\)Ai đó thương tình k dùm mik, mik bị trừ điểm thảm thương luôn!!!!

Answer 4

Nhầm \(b.x=-45\)

Answer 5

5.(x-6)-2.(x+3)=12

5x-30-2x-6=12

5x-2x-30-6=12

3x-36=12

3x=12+36

3x=48

x=48:3

x=16

2.(x-5)-3.(x+7)=14

2x-10-3x-21=14

2x-3x-10-21=14

(-1)x-31=14

(-1)x=14+31

(-1)x=45

x=45:(-1)

x=-45

Answer 6

5.(x-6)-2.(x+3)=12

5x-30-2x-6=12

5x-2x-30-6=12

3x-36=12

3x=12+36

3x=48

x=48:3

x=16

2.(x-5)-3.(x+7)=14

2x-10-3x-21=14

2x-3x-10-21=14

(-1)x-31=14

(-1)x=14+31

(-1)x=45

x=45:(-1)

x=-45

Answer 7

5.(x-6)-2.(x+3)=12

5x-30-2x-6=12

5x-2x-30-6=12

3x-36=12

3x=12+36

3x=48

x=48:3

x=16

2.(x-5)-3.(x+7)=14

2x-10-3x-21=14

2x-3x-10-21=14

(-1)x-31=14

(-1)x=14+31

(-1)x=45

x=45:(-1)

x=-45