\(6.\left(x+9845\right)=29042.6\)

\(x+9845=29042\)

\(x=19197\)

\(\left(x:3\right).8=8.3198\)

\(x:3=3198\)

\(x=1066\)

y=  19197

x= 9594

k mk nhé bạn iu

\(6\times\left(y+9845\right)=29042\times6\)

            \(y+9845\) \(=29042\times6\div6\)

           \(y+9845\)  \(=29042\)

           \(y\)                    \(=29042-9845\)

           \(y\)                    \(=19197\)

\(\left(x\div3\right)\times8=8\times3198\)

   \(x\div3\)        \(=8\times3198\div8\)

   \(x\div3\)        \(=3198\)

   \(x\)                  \(=3198\times3\)

   \(x\)                  \(=9594\)

a) 6*(x+ 9845) = 29042*6

    6*(x + 9845) = 174252

        x + 9845  = 174252

        x             = 174252 - 9845

        x             = 164407

b) (x:3)*8= 8 * 3198

     x:3 *8= 25584

     x:3    = 25584:8

     x:3    = 3198

     x       = 3198*3

     x       = 9594

a,

6.(x+9845)=29042.6

x+9845=29042

x=29042-9845

x=19197

b,

(x:3).8=8.3198

x:3=3198

x=3198.3

x=9594

19197 minh vua tinh xong do k minh nha

y = 19197

câu 2 chọn C nha

A.96:2

B.9600:20

C.9600:2

D.960:2

Lời giải  đầy đủ:

Bài 3:tìm x

A,

6.(x+9845)=29042.6

(x+9845)=29042.6:6

x+9845=29042

x=29042-9845

x=19197.

B,

(x:3).8=8.3198

(x:3)=3198.8:8

x:3=3198

x=3198.3

x=9594.

Bài 7:

A/191+x+9=43.5

200+x=215

x=215-200

x=15.

B/x.25.4=125.8

x.100=1000

x=1000:100

x=10.

Bài 8:

A/ 128.x-12.x-16.x=5208000

(128-12-16).x=5208000

100.x=5208000

x=5208000:100

x=52080.

B/ x.27+x.30+x.43=210500

x.(27+30+43)=210500

x.100=210500

x=210500:100

x=2105.

K mình nhé!

1. A) 225886 + 779 × 8

= 225886 + 6232

= 232118

B) 125 × 5 × 20 × 8

= (125 × 8) × (5 × 20)

= 1000 × 100

= 100000

C) 47286 : 2 + 14765

= 23643 + 14765

= 38408

D) 91428 - 23560 : 5

= 91428 - 4712

= 86716

3. A) 36 × 532 + 63 × 532 + 532

= 532 × (36 + 63 + 1)

= 532 × 100

= 53200

B) 679 × 123 + 679 - 679 × 24

= 679 × (123 + 1 - 24)

= 679 × 100

= 67900

C) 245 × 327 - 245 × 18 - 9 × 245

= 246 × (327 - 18 - 9)

= 245 × 300

= 73500

3. Tính bằng cách thuận tiện nhất

A, 36 x 532 + 63 x 532 + 532

= (36 + 63 + 1) x 532 = 100 x 532 = 53 200

B, 679 x 123 + 679 - 679 x 24

= 679 x (123 + 1 - 24)

= 679 x 100 = 67 900

C, 245 x 327 - 245 x 18 - 9 x 245

= 245 x (327 - 18 - 9)

= 245 x 300

= 73 500

Bài 2:

a: \(6\cdot\left(x+9845\right)=29042\)

=>\(x+9845=\dfrac{29042}{6}=\dfrac{14521}{3}\)

=>\(x=\dfrac{14521}{3}-9845=-\dfrac{15014}{3}\)

b: \(\left(x:3\right)\cdot8=8\cdot3198\)

=>\(x:3=3198\)

=>\(x=3198\cdot3=9594\)

Bài 1:

a: \(225886+779\cdot8\)

\(=225886+6232\)

\(=232118\)

b: \(125\cdot5\cdot20\cdot8\)

\(=\left(125\cdot8\right)\cdot\left(5\cdot20\right)\)

\(=1000\cdot100=100000\)

c: \(47286:2+14765\)

\(=23643+14765\)

=38408

d: \(91428-23560:5\)

\(=91428-4712\)

=86716