`a) 2x – (–17) = 15`
`=>2x+17=15`
`=>2x=15-17`
`=>2x=-2`
`=>x=-1` `text((số nguyên âm))`
`b)x-2=-3`
`=>x=-3+2`
`=>x=-1` `text((số nguyên âm))`
`c)2x+12=3(x-7)`
`=>2x+12=3x-21`
`=>2x-3x=-21-12`
`=>-x=-33`
`=>x=33` `text((số nguyên dương))`
`d)2(x-3)-3(x-5)=4(3-x)-18`
`=>2x-6-3x+15=12-4x-18`
`=>-x+9=-4x-6`
`=>-x+4x=-6-9`
`=>3x=-15`
`=>x=-5` `text((số nguyên âm))`
`e)– 2(2x – 8) + 3(4 – 2x) = -72 – 5(3x – 7)`
`=>-4x+16+12-6x=-72-15x+35`
`=>-4x-6x+15x=-72+35-12-16`
`=>5x=-65`
`=>x=-13` `text((số nguyên âm))`
$@FBoy24$