Vì số quá lớn nên cứ ghi 6\(^{ }\)¹⁹ thôi

hi friend, today i'll talk about my leisure activities with my friends.I often hangout with friends, that's one of my favorite leisure activities, it gives me a feeling of relaxation, At the same time, it also helps me come into contact with fresh air. but i can spend about one-two hour to play games with my friend, that activities is so funny, sometime i can't stop laugh when i see a funny moment with my friends. so, that all of today, goodbye and see ya!

1. I usually have free time in the evening

2. I often hang out with friends

3. because i feel it good and relaxing

M x 1 bằng m nhed

a) 25 : x = -3

           x = 25 : -3

           x = 8,333

b) 27.(x + 1) = -243

              (x + 1) = -243 : 27

              (x + 1) = -9

                          x = -9 + 1

                          x = -8

a) = 99 - (74 - 129) : 5 + 1

    = 99 - -55 : 5 +1

    = 99 - -11 + 1

    = 110 + 1

     = 111

b) (-35) + 127 + (-65) + 73 = (-35 + -65) + 127 + 73

                                           = (-100) + 200

                                           = 100

3 x (x+1)=x+9

3x+3=x+9

3x-x=-3+9

2x=6

x=3

Tổng số phần bằng nhau là:

4+7=11

tuổi của bố là:

110:11x4=40

tuổi ông là:

110-40=70

12x+34=20

12x=20-34

12x=-14

X= -7/6

a) $2x=7+x$

$2x-x=7$

$x=7$

Vậy S={7}𝑆={7} ={7}

b)\(\dfrac{\text{x−3 ​ ​ }}{5}\) + \(\dfrac{\text{1+2x}}{\text{3}}\) = 6

\(\dfrac{3\left(x-3\right)}{15}+\dfrac{5\left(1+2x\right)}{15}=6\)

3x-9+5+10x=90

13x-4=90

13x=94

x=\(\dfrac{94}{13}\)

Vậy S={\(\dfrac{94}{13}\)}