6x-5(x-7)=(27-514)-(486-73)
Tìm x:
6x - 5 . (x - 7) = ( 27 - 514) - (486 - 73)
Mình đang cần gấp, mong mọi người hỗ trợ
Ta có: \(6x-5.\left(x-7\right)=\left(27-514\right)-\left(486-73\right)\)
\(\Leftrightarrow6x-5x+35=-487-413\)
\(\Leftrightarrow x=-900-35\)
\(\Leftrightarrow x=-935\)
Vậy \(x=-935\)
6x-5(x-7)=(27-514)-(486-73)
=>6x-5x+35=-487-413
=>x=-487-413-35
=>x=-935
vậy x=-935
5x - 2 .(x-1)=-4.3.125.(-25).8
7x + 6 .(3-x)=27 - 20 + 73
6x - 5 . ( x- 7 ) = ( 27 - 514 ) - ( 486 - 73 )
3./x+4/-2.(x-1)= 7-2x
2./x-6/+7x-2=/x-6/+ 7x
//=giá trị tuyệt đối
Mấy bài thực hiện phép tính bn tự làm nha
3.|x+4|-2.(x-1)=7-2x
3.|x-4|-2x-2=7-2x
=>2.|x-4| =7-2x+2x+2
=>2.|x-4| =9-4x
=>|x-4| =4,5-2x
=>x-4=4,5-2x hoặc x-4=-4,5+2x
2+2x=4,5+4 4,5-4=2x-2
3x =8,5 0,5 =x
x =8,5:3
x =2,833
Vậy x\(\in\){2,833;0,5}
Phần còn lại bn làm tương tự nha
Chúc bn học tốt
1, 7x+6(3-x)=27-20+73
2,6x-5(x-7)=(27-514)-486-73)
3,2x-6=3(x-5)+25+27-15-17
4, 4(x-5)-3(x+5)=2579-2578
5,/x-5/-7(x+4)=5-7x
6,3/x+4/-2(x-1)=7-2x
7, 2/x-6/+7x-2=/x-6/+7x
8,/x+8/+5(x-2)=5x-10:2
9, /x+2/-6(x-4)=20-6x
1: Ta có: 7x+6(3-x)=27-20+73
\(\Leftrightarrow7x+18-6x=80\)
\(\Leftrightarrow x=80-18=62\)
Vậy: x=62
2: Ta có: \(6x-5\left(x-7\right)=\left(27-514\right)-486-73\)
\(\Leftrightarrow6x-5x+35=27-514-486-73\)
\(\Leftrightarrow x+35=-1046\)
\(\Leftrightarrow x=-1081\)
Vậy: x=-1081
tìm x biết
1) 9-25=(7-x)-(25+7)
2) (27-514) -(486-73)+x=7
3) 25+5+37-25+6-29-x=37
4) 14+(-12)+x =10-/-15/+ /-3/
1) 9-25=(7-x)-(25+7)
(7-x)-(25+7)=9-25
(7-x)-(25+7)=-16
(7-x)-32=-16
7-x=-16+32
7-x=16
x=7-16
x=-9
2) (27-514) -(486-73)+x=7
(27-514) -(486-73)+x=7
-487-413+x=7
-1011+x=7
x=7-(-1011)
x=7+1011
x=1018
3) 25+5+37-25+6-29-x=37
25+5+37-25+6-29-x=37
67-25+6-29-x=37
42+6-29-x=37
48-29-x=37
19-x=37
x=19-37
x=-18
4) 14+(-12)+x =10-/-15/+ /-3/
14+(-12)+x =10-15+3
14+(-12)+x =-5+3
14+(-12)+x =-2
2+x=-2
x=-2-2
x=-4
(27+514)-(-486-73)
( 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 - 514 - 486 + 73
= ( 27 + 73 ) - ( 514 + 486 )
= 100 - 1000
= -900
( 27 - 514 )-(486-73)
=(514+486) - (27 + 73)
= 1000 -100
= 900
\(\left(27-514\right)-\left(486-73\right)\)
\(=27-514-486+73\)
\(=\left(27+73\right)-\left(514+486\right)\)
\(=100-1000=-900\)
Tính nhanh: (27 – 514) – (486 – 73)
(27 – 514) –(486 – 73) = 27 – 514 – 486 + 73
= (27 + 73) – (514 + 486) = 100 – 1000 = -900
bỏ ngoặc rồi tính
5) (27+514)-(486-73)
6)(36+79)+(145-79-36)
7) 10-[12-(-9-1)]
a) (27+514)-(486-73)
=27+514-486+73
=541-486+73
=55+73
=128
b) (36+79)+(145-79-36)
=36+79+145-79-36
=115+145-79-36
=260-79-36
=181-36
=145
c) 10-[12-(-9-1)]
=10-12+(-9)+(-1)
=(-2)+(-9)+(-1)
=(-11)+(-1)
=-12
tick nha bạn
5)27+514-486+73
6)36+79+145-79-36
7)10-12-9-1
(27+514)-(486-73)
=27+514-486+73
=(27+73)-(486+514)
=100-1000
=(-10)
TÍNH NHANH: (27-514)-(486-73)