Question

Which equation has the solution x=4: 4x=20 x/2=8 x+8=3x x =x+5/2

Answer 1

Explanation:

4x = 20

x = 20/4 = 5

x/2 = 8

x = 8 x 2 = 16

x + 8 = 3x

8 = 3x - x

8 = 2x

8/2 = x

4 = x

x = x + 5/2

2x = 5/2

x = 5/2 x 2

x = 5

Answer 2

x+8=3x

Explanation:

4x=20

4x/4=20/4

x=5

The solution to the first equation is x=5.

x/2=8

2(x/2)=2(8)

x=16

The solution to the second equation is x=16.

x+8=3x

x+8-x=3x-x

8=2x

8/2=2x/2

x=4

The solution to the third equation is x=4.

x=x+5/2

x-x=x+5/2-x

-x=5/2

x=-5/2

The solution to the fourth equation is x=-5/2.

The equation x+8=3x has the solution to x=4.