Wgat is the answer.

Question

Twice the sum of a number and 4 is 7 .

Answer 1

The sum of a number and 4 can be expressed as x+4

Twice times the sum of a number and for can be expressed as 2 (x + 4)

The "is 7" at the end can be expressed as "= 10"

 

Put the pieces together and here is what you get:

 

2 (x + 4) = 7

 

Solve:

 

2 (x + 4) = 7

 

2x + 8 = 7

2x = -1

x = -¹/₂

Answer 2

Let x = the number

 

2(x + 4) = 7  [Twice the sum of a number and 4 is 7]

 

Then x = 7/2 - 4 = -1/2