The sum of three times a number and five is eight more than the number

Answer 1

Let's use the varable x to represent the unkniwn number.

Then " the sum of three times a number and five" would be written as: 3x + 5

The words, "is eight more han the number" would be: = 8 + x

Combining these expressionsgives us:

3x + 5 = x + 8

Now combine like terms and use inverse operations to solve for x:

3x + 5 - x = x + 8 - x

2x + 5 = 8

2x + 5 - 5 = 8 -5

2x = 3

2x/2 = 3/2

x = 1.5

The number is 1.5 (or 1 and 1/2).