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Popular Word Problems >

Twice the difference of a number and 7 is 9

Solution

Tw i ce t h e d i ff ere n ce o f a n u mb er an d 7 i s 9

Solution

The number : 11 \frac{1}{2}

Solution steps

Represent the number with

x

A.T.Q.:

2 (x - 7) = 9

Solve for

x, 2 (x - 7) = 9 : x = \frac{23}{2}

Convert improper fractions to mixed numbers:

\frac{23}{2} = 11 \frac{1}{2}

The number : 11 \frac{1}{2}

Popular Examples

25% of what number is 9 What is the volume of a sphere with a radius of 60.5 ft, rounded to the nearest tenth of a cubic foot?Jon opened a savings account and deposited 800.00 as principal. The account earns 2% interest, compounded annually. What is the balance after 6 years?A circular region with a radius of 12 km is under typhoon signal number 1, What is the area of the circular region Evelyn has 90 in an account. The interest rate is 5% compounded annually.To the nearest cent, how much will she have in 3 years?