Question

chỉ cho tớ

x + (- 5) = -(-7)

x-3=-17

-(-30)-x=-13

(-7)-x=-3

-15+x=-11-(-57)

5x+22=12

2x-18=10

Answer 1

x + (- 5) = -(-7)
x = (-7) - (-5)
x = (-7) + 5 
x = -2

x-3=-17
x = -17 + 3 
x = -14

-(-30)-x=-13
30 - x = -13
x = 30 - 13
x = 17

(-7)-x=-3
x = (-7) - (-3)
x = (-7) + 3 
x = -4

-15+x=-11-(-57)
-15+x= 46
x = 46 -(-15)
x = 46 + 15
x = 61

5x+22=12
5x = 12 - 22 
5x = -10
x = -10 : 5
x = -2

2x-18=10
2x = 10 + 18 
2x = 28 
x = 28 : 2 
x = 14 
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Answer 2

x+(-5)=-(-7)

=>x-5=7

=>x=7+5=12

x-3=-17

=>x=-17+3

=>x=-(17-3)=-14

-(-30)-x=-13

=>30-x=-13

=>x=30-(-13)=30+13=43

(-7)-x=-3

=>x=-7-(-3)=-7+3=-4

-15+x=-11-(-57)

=>-15+x=-11+57=46

=>x=46-(-15)=46+15=61

5x+22=12

=>5x=12-22=-10

=>x=-10:5=-2

2x-18=10

=>2x=10+18=28

=>x=28:2=14

Answer 3

x+(-5)=-(-7)\(\Rightarrow\)x+(-5)=7\(\Rightarrow\)x=7-(-5)=12

x-3=-17\(\Rightarrow\)x=-17+3=-14

-(-30)-x=-13\(\Rightarrow\)x=-(-30)-(-13)=43

(-7)-x=-3\(\Rightarrow\)x=(-7)-(-3)=-4

-15+x=11-(-57)\(\Rightarrow\)-15+x=68\(\Rightarrow\)x=68-(-15)=83

5x+22=12\(\Rightarrow\)5x=12-22=-10\(\Rightarrow\)x=-10:5=-2

2x-18=10\(\Rightarrow\)2x=10+18=28\(\Rightarrow\)x=28:2=14