Question

Will Fan And Medal
What could you do to eliminate the fractions in the equation c-sevenths minus three-sevenths equals one-seventh?

A. Add three-sevenths to both sides of the equation.
B. Multiply both sides of the equation by one-seventh.
C. Multiply both sides of the equation by 7.
D. Subtract three-sevenths from both sides of the equation.

Answer 1

c/7 - 3/7 = 1/7
To eliminate the fraction, you must multiply the entire equation by 7
(7) c/7 - (7)3/7 = (7)1/7
c - 3 = 1
c = 1 + 3
c = 4
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5 4/9 - (-2 8/9) -- negative times a negative = a positive, thus changing your problem to :
5 4/9 + 2 8/9 -- change to improper fractions
49/9 + 26/9 = 75/9 turned into a mixed number = 8 1/3