Question

a) 2x - 3 = -5

b) 13 - ( 3x - 4 ) = -7

Answer 1

a: =>2x=-2

hay x=-1

b: =>3x-4=20

=>3x=24

hay x=8

Answer 2

giúp em với ạ e lm bài kiểm tra ạ

Answer 3

a) 2x-3=-5            b) 13-(3x-4)=-7

⇒2x=-2                  ⇒3x-4=20

⇒x=-1                     ⇒3x=24

                               ⇒x=8

Answer 4

A x=-1

B x=8 

Answer 5

a)2x=-2

=> x=-1

b) -3x+4=-7-13

=>-3x+4=-20

=>-3x=-20-4

=>3x=24

=>x=8

Answer 6

a) 2x - 3 = -5 
    2x      = -5 + 3
    2x      = -2
      x      = -2 : 2
      x      = -1

Answer 7

 a)2x=-5+3

2x=2

x=1

 

b)13-3x+4=-7

-3x+17=-7

-3x=-24

x=-24:(-3)

x=8

 

Answer 8

\(\text{a) 2x - 3 = -5}\)

\(2x=-5+3\)

\(2x=-2\)

\(x=-2:2\)

\(x=-1\)

\(\text{b) 13 - ( 3x - 4 ) = -7}\)

\(\left(3x-4\right)=13-\left(-7\right)\)

\(3x-4=20\)

\(3x=20+4\)

\(3x=24\)

\(x=24:3\)

\(x=8\)