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x=-4
x-4=-7/+4
x=-3
6-x=11/-6
-x=5/*(-1)
x=-5
x=-4
2) x-4=-7 |+4
x=-3
3) 6-x=11 |-6
-x=5 | ×(-1)
x=-5
x= (-4)
2. x-4=-7/ +4
x= (-3)
3.6-x=11/ -6
-x= 5/ ×(-)
x= (-5)