d/ [34 – (8^2 + 14):13]: x = 25
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15 - (-15 + 2) = 15 + 13 = 28
(-14) - (17 - 8) = -14 - 9 = -23
15 - (21- 7) = 15 - 14 = 1
34 + (-15) - 17 = 19 - 17 = 2
(-34) + (-12) + 18 = -46 + 18 = -28
27 - 15 - 19 = 12 - 19 = -7
34 - (-15) + 8 = 49 + 8 = 57
-37 + 13 - 25 = -24 - 25 = -49
40 - 17 + (-25) = 23 + (-25) = -2
16 + (-15) - 18 = 1 - 18 = -17
15 - 14 - 13 = 1 - 13 = -12
-27 + 15 - 17 = -12 - 17 = -29
34 - 71 = -37
28 - 125 = -97
13 + (-27) = -14
14 - (-34) = 48
28 - (-16) = 44
-15 - 8 = -23
-27 - 34 = -61
-25 - (-18) = -7
46 - 25 - (-25) = 21 + 25 = 46
-37 - (-24) = -13
46 - (-15) = 61
-26 - 6 + 7 = -32 + 7 = -25
@linhcute
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a: =>3x=10+14=24
=>x=8
b: =>25-30-x=-19
=>-5-x=-19
=>x+5=19
=>x=14
c: =>15-x=12+14=26
=>x=-11
d: =>4x+11-x-34=67
=>3x-23=67
=>3x=90
=>x=30
e: =>-x-14=289-36-289=-36
=>x+14=36
=>x=22
a) 3x=24
x=8
b) 25-30-x=-19
25-30+19=x
14=x
c) 15-x=26
x=-11
d) 4x+11-x-34=67
3x=90
x=30
e) -14-x= -36
x=-14 -36
x= 22
![](https://rs.olm.vn/images/avt/0.png?1311)
a.x+8=âm 17
x = - 17 - 8
x = -25
b. ( x - 7 ) + 13 = 25
( x - 7 ) = 25 - 13
( x - 7 ) = 12
x = 12 + 7
x = 19
![](https://rs.olm.vn/images/avt/0.png?1311)
B1
a.35*18-5*7*28
=35*18-35*28
=35*(-10)
=-350
b.24*(16-5)-16*(24-5)
=(24*16)-24*5-(16*24)-16*5
=384-24*5-384-16*5
=(384-384)-24*5-16*5
=0-24*5-16*5
=5*(-24-16)
=5*(-8)
=-40
c.29*(19-23)-19*(29-13)
=(29*19)-(19*29)*23-13
=(551-551)*23-13
=0*10
=0
d.34+35+36+37-14-15-16-17
=(34-14)+(35-15)+(36-16)+(37-17)
=20+20+20+20
=80
![](https://rs.olm.vn/images/avt/0.png?1311)
a) x = 1 36 + − 3 4
x = 1 + − 27 36 x = − 26 36 x = − 13 18
b) x = 2 5 + 1 4 + − 1 3
x = 24 + 15 + − 20 60 x = 19 60
d,[34-(8^2+14):13]:x=25
[34-(64+14):13]:x=25
[34-78:13]:x=25
28:x=25
x=25.28
x=700