The sum of a number and its double is 69. What is the number?

A.) 46.6

B.) 34.5

C.) 23

D.) 20

A.) 46.6

B.) 34.5

C.) 23

D.) 20

**x = the number**

**2x = its double**{double a number is multiplying by 2}

x + 2x = 69 {the sum of a number and its double is 69}

3x = 69 {combined like terms}

x = 23 {divided each side by 3}

**C.) 23**

*Check*- the sum of 23 and its double, 46, is 69

23 + 46 = 69

**☑**

*- Algebra House*