1)  (27-514)-(486-78)

    =-487-408

   =-895

2)=40

3)=407

   ( 27 + 514 ) - ( -486 - 73 )

= 27 + 514 + 486 + 73

= ( 27 + 73 )  + ( 514 + 486 )

= 100 + 1000

= 1100

(27+514)-(486-73)

=(27+73)+(514-486)

=100+28

=128

= 27 - 514 - 486 + 73

= ( 27 + 73 ) - ( 514 + 486 )

= 100 - 1000

= -900

( 27 - 514 )-(486-73)

=(514+486) - (27 + 73)

= 1000 -100

= 900

\(\left(27-514\right)-\left(486-73\right)\)

\(=27-514-486+73\)

\(=\left(27+73\right)-\left(514+486\right)\)

\(=100-1000=-900\)

(27 – 514) –(486 – 73) = 27 – 514 – 486 + 73

= (27 + 73) – (514 + 486) = 100 – 1000 = -900

\(\left(27-514\right)-\left(486-73\right)\)

= \(27-514-486+73\)

= \((27+73)+(-514-486)\)

= \(100-1000\)

= \(900\)

(27-514) -(486 -73)

=27-514-486+73

= (27 + 73 ) - (514+486)

=100-1000= -900

Chúc bạn học tốt

(27 - 514) - ( 486 -73) hoặc (27 -514) - (486 - 73)

= (27+73) - (514+486) = (514+486) - (27+73)

= 100 - 1000 = 1000 -100

= -900 =900

vậy bài toán có hai đáp án = - 900 hoặc = 900

\(6x-5\left(x-7\right)=\left(27-514\right)-\left(486-73\right)\)

\(\Leftrightarrow6x-5x+35=27-514-486+73\)

\(\Leftrightarrow x=27-514-486+73-35\)

\(\Leftrightarrow x=-935\)

Đề bài : Tìm số nguyên x?

6x-5(x-7)=(27-514)-(486-73)

6x-5x+35=-900

x+35=-900

x=(-900)-35

x=-935

Vậy x=-935

\(\text{6x-5(x-7)=(27-514)-(486-73)}\)

\(6x-5\left(x-7\right)=27-514-486+73\)

\(6x-5\left(x-7\right)=\left(27+73\right)+\left(-514-486\right)\)

\(6x-5x+35=100+\left(-1000\right)\)

\(x+35=-900\)

\(\Rightarrow x=-900-35\)

\(\Rightarrow x=-935\)

học tốt

= 27 + 514 - 486 + 73

=(27 + 73) +(514 - 486 )

= 100 + 28 =128

(27+514)-(486-73)

=541-413

=128 

mình trước nha 

\(\text{(27+514)-(486-73)}\)

\(=27+514-486+73\)

\(=\left(27+73\right)+\left(514-486\right)\)

\(=100+28\)

\(=128\)

-7624 + ( 1543 + 7624 )

= -7624 + 1543 + 7624

= ( -7624 + 7624 ) + 1543

= 0 + 1543

= 1543

( 27 - 514 ) - ( 486 - 73 )

= 27 - 514 - 486 + 73

= ( 27 + 73 ) - ( 514 + 486 )

= 100 - 1000

= -900

-7624 + ( 1543 + 7624 )

= ( -7624 + 7624 ) + 1543

= 0 + 1543

= 1543

( 27 - 514 ) - ( 486 - 73 )

= ( -487 ) - 413

= -900

\(-7624+\left(1543+7624\right)\)

\(=-7624+1543+7624\)

\(=1543\)

\(\left(27-514\right)-\left(486-73\right)\)

\(=27-514-486+73\)

\(=\left(27+73\right)-\left(514+486\right)\)

\(=100-1000\)

\(=900\)