461,983 views
37 votes
37 votes
Twice a certain number decreased by 10 is -1 1/3. what is the number?

User Gulzar
by
2.5k points

1 Answer

9 votes
9 votes

Answer:

R = 13/3

Explanation:

Based on the given conditions, formulate: 2 x r - 10 = -1 1/3

Apply Multiplicative Distribution Law: 2r - 10 = -1 - 1/3

Multiply both sides of the equation by the common denominator: 2r x 3 -10 x 3 = -3 - 3/3

Reduce the fractions: 2r x 3 - 10 x 3 = -3 - 1

Multiply the monomials: 6r - 10 x 3 = -3 - 1

Calculate the product or quotient: 6r - 10 x 3 = -3 - 1

Rearrange unknown terms to the left side of the equation: 6r = -3 - 1 + 30

Calculate the sum or difference: 6r = 26

Divide both sides of the equation by the coefficient of variable: r = 26/6

Cross out the common factor: r = 13/3

Answer: r = 13/3

User Vfn
by
2.8k points