2 . Tìm x
h ) -5x + 5 = ( -3 ) . ( -8) + 6
k) – 4x = ( -8 ) . ( -4 ) – 12
l) -2x +5 = ( -3) . ( -3) + 8
m ) – 8x = ( -10) . ( -2) -4
n) -9x + 3 = ( -2) . ( -7 ) + 16
o ) 22x + 100 = 21-
p) -12x -34 = 2
2 . Tìm x
h ) -5x + 5 = ( -3 ) . ( -8) + 6
k) – 4x = ( -8 ) . ( -4 ) – 12
l) -2x +5 = ( -3) . ( -3) + 8
m ) – 8x = ( -10) . ( -2) -4
n) -9x + 3 = ( -2) . ( -7 ) + 16
o ) 22x + 100 = 21-
p) -12x -34 = 2
Bài `2` :
`h)`
`-5x + 5 = -3 . (-8) + 6`
`-5x +5 = 30`
`-5x = 25`
`x = -5`
`k)`
`-4x = (-8) . (-4) – 12`
`-4x =20`
`x = -5`
`l)`
`-2x +5 = (-3) . (-3) + 8`
`-2x +5 = 17`
`-2x = 12`
`x = -6`
`m)`
`-8x = (-10) . (-2) – 4`
`-8x = 16`
`x = -2`
`n)`
`-9x +3 = -2 . (-7) + 16`
`-9x = 27`
`x = -3`
`o)`
`22x + 100 = 210`
`22x = 110`
`x = 110/22`
`x = 5`
`p)`
`-12x – 34 = 2`
`-12x =36`
`x = -3`
h ) -5x + 5 = ( -3 ) . ( -8) + 6
-5x + 5 = 24 + 6
-5x + 5 = 30
-5x = 30 – 5
-5x = 25
x = 25 : ( -5)
x = -5
k) – 4x = ( -8 ) . ( -4 ) – 12
– 4x = 32 -12
– 4x = 20
x = 20 : ( -4 )
x = -5
l) -2x +5 = ( -3) . ( -3) + 8
-2x +5 = 9 + 8
-2x +5 = 17
– 2x = 17 – 5
– 2x = 12
x = 12 : ( -2)
x = – 6
m ) – 8x = ( -10) . ( -2) -4
– 8x = 20 – 4
– 8x = 16
x = 16 : ( -8 )
x = – 2
n) -9x + 3 = ( -2) . ( -7 ) + 16
-9x + 3 = 14 + 16
-9x + 3 = 30
-9x = 30 – 3
– 9x = 27
x = 27 : ( -9)
x = – 3
o ) 22x + 100 = 210
22x = 210 – 100
22x = 110
x = 110 : 22
x = 5
p) -12x -34 = 2
– 12x = 34 + 2
– 12x = 36
x = 36 : ( -12 )
x = – 3