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4. Five times a number decreased by twenty-five is ten.
A. 50 + 25 = 10
B. 50 - 25 = 10
C. 25 + 5c = 10
D. 25 - 50 = 10
5. Twice the sum of ninety and a certain number is equal to two hundred.
A. 2(90 + a) = 200
B. 2(90 - a) = 200
C. 90(2 + a) = 200
D. 90(2-a) = 200
6. Translate into word phrases: b + 16 = 24
A. The sum of a number and twenty-four is equal to sixteen.
B. The difference of a number and twenty-four is equal to sixteen.
C. The sum of a number and sixteen is equal to twenty-four.
D. The difference of a number and sixteen is equal to twenty-four.