x + 123 = 456 - 100

x + 123 = 356

x = 356 - 123

x = 233

x+123=456-100

x+123=356

x=356-123

x=233

x = 233

\(456+123x=789\)

\(123x=789-456=333\)

\(x=333:123=\dfrac{111}{41}\)

x+123=456

     x   =456-123

     x   =333   

x + 123 = 456

x           = 456 - 123

x           = 333

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x+123=456

    x    =456-123

    x    =333

 x + ( 123 + 456 ) - ( 23 + 56 ) = 789 

x+579-79=789

x+579=789+79=     1568

x=1568-579=989

nhớ kick cho ình nha

Tìm x  :  

x + ( 123 + 456 ) - ( 23 + 56 ) = 789 

x + 579 - 79 = 789 

x + 579 = 789 + 79 = 868

x = 868 - 579 

x = 289 

X = 289 NHA BN

a) \(58+7x=100\)

\(=>7x=100-58\)

\(=>7x=42\)

\(=>x=42:7\)

\(=>x=6\)

b) \(3x-7=28\)

\(=>3x=28+7\)

\(=>3x=35\)

\(=>x=35:3\)

\(=>x=\dfrac{35}{3}\)

c) \(x-56:4=16\)

\(=>x-14=16\)

\(=>x=16+14\)

\(=>x=30\)

d) \(101+\left(36-4x\right)=105\)

\(=>36-4x=105-101\)

\(=>36-4x=4\)

\(=>4x=36-4\)

\(=>4x=32\)

\(=>x=32:4\)

\(=>x=8\)

e) \(\left(x-12\right):12=12\)

\(=>x-12=12.12\)

\(=>x-12=144\)

\(=>x=144-12\)

\(=>x=132\)

f) \(\left(3x-2^4\right).7^3=2.7^4\)

\(=>3x-2^4=2.7^4:7^3\)

\(=>3x-16=2.7=14\)

\(=>3x=14+16\)

\(=>3x=30\)

\(=>x=30:3\)

\(=>x=10\)

i) \(\left(10+2x\right).4^{2011}=4^{2013}\)

\(=>10+2x=4^{2013}:4^{2011}\)

\(=>10+2x=4^2=16\)

\(=>2x=16-10\)

\(=>2x=6\)

\(=>x=6:2\)

\(=>x=3\)

\(#WendyDang\)

\(123\cdot456+456\cdot321-256\cdot444\)

\(=\left(123+321\right)\cdot456-256\cdot444\)

\(=444\cdot456-256\cdot444\)

\(=444\cdot\left(456-256\right)\)

\(=444\cdot200\)

\(=88800\)

là 88800

hok tốt

                      Bài làm :

123 x 456 + 456 x 321 - 256 x 444 = 56088 + 146376 - 113664

                                                        = 88800

                       Đ/S : 88800 

Ta có: \(123\times456+456\times321-256\times444\)

           \(=444\times456-256\times444\)

           \(=444\times\left(456-256\right)\)

            \(=444\times200\)

            \(=444\times200=88800\)

\(101+\left(36-x\right)=105\)

\(\Rightarrow36-x=105-101\)

\(\Rightarrow36-x=4\)

\(\Rightarrow x=36-4\)

\(\Rightarrow x=32\)

Vậy: x = 32 

101+(36-x)=105

         36-x = 105-101

         36-x = 4

                x= 36 - 4

                x = 32

Vậy x = 32

123+x=456+123

123+x=579

        x=579-123

        x=456

X=456

123 + x = 456 + 123

123 + x = 579

           x = 579 - 123

           x = 456

kiểm tra hộ mk nhé

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