7(x-3)-5(3-x)=11x-5

<=>7(x-3)+5(x-3)-11x+5=0

<=>12(x-3)-11x+5=0

<=>12x-36-11x+5=0

<=>x-31=0

<=>x=31

a, => 7x-63-30+5x=11x-6

=> 12x-93=11x-6

=> 12x=11x-6+93 = 11x+87

=> 12x-11x=87

=> x=87

b, => 7x-21-15+5x=11x-5

=> 12x-36=11x-5

=> 12x=11x-5+36 = 11x+31

=> 12x-11x=31

=> x=31

Tk mk nha

\(-5.\left(2-x\right)+4\left(x-3\right)=10x+15\)

       \(-10+5x+4x-12=10x+15\)

                                \(9x-22=10x+15\)

                              \(10x-9x=-22-15\)

                                              \(x=-37\)

\(7.\left(x-9\right)-5\left(6-x\right)=-6+11x\)

       \(7x-63-30+5x=-6+11x\)

                          \(12x-93=-6+11x\)

                        \(12x-11x=-6+93\)

                                          \(x=87\)

\(xy+14+2y+7x=-10\)

\(\left(xy+2y\right)+\left(14+7x\right)=-10\)

\(y\left(x+2\right)+7\left(2+x\right)=-10\)

\(\left(x+2\right)\left(y+7\right)=-10\)

Câu cuối mk chỉ biết làm đến đó thôi 

bn tự làm nha

a) -3.(x-5) + 6.(x+2) = 9

-3x + 15 + 6x + 12 = 9

3x + 27 = 9

3x = -18

x = -6

b) 7.(x-9) - 5.(6-x) = -6 + 11.x

7x - 63 - 30 + 5x = - 6 +  11.x

=> 12x - 11x = - 6 + 63 + 30

x = 87

c) 10.(x-7) - 8.(x+5) = 6.(-5) + 24

10x - 70 -8x - 40 = -6

2x - 110 = - 6

2x = 104

x = 52

\(-3\left(x-5\right)+6\left(x+2\right)=9\)

\(\Rightarrow-3x+15+6x+12=9\)

\(\Rightarrow-3x+6x=9-15-12\)

\(\Rightarrow3x=-18\)\(\Rightarrow x=-6\)

\(7\left(x-9\right)-5\left(6-x\right)=-6+11x\\ \Rightarrow7x-63-30+5x+6-11x=0\\ \Rightarrow x-87=0\\ \Rightarrow x=87\)

\(7x-63-30+5x+6-11x=0\\ x-87=0\\ x=87\)

Xin chào các bạn !!!
Hãy Đăng Kí Cho Channel Kaito1412_TV Để nhé ! 

Link là : https://www.youtube.com/channel/UCqgS-egZEJIX-ON873XpD_Q/videos?view_as=subscriber

7 ( x – 9 ) – 5 ( 6 – x ) = -6 + 11x

7x - 7.9 - 5.6 + 5x = -6 + 11x

7x - 63 - 30 + 5x = -6 + 11x

7x + 5x - 63 - 30 - 11x = -6

7x + 5x - 11x = -6 + 63 + 30

7x + 5x - 11x = 87

x ( 7 + 5 -11 ) = 87

x . 1 = 87

x = 87

\(7\left(x-9\right)-5\left(6-x\right)=-6+11x.\)

\(\left(7x-63\right)-\left(30-5x\right)=-6+11x\)

\(7x-63-30+5x=-6+11x\)

\(12x-93=-6+11x\)

\(12x-11x=93-6\)

\(x=87\)