Write the following as an equation, using x for the unknown number. Then solve.When 3 times a number is subtracted from 7 times the number, the result is 28. Find the number.
A. 3(x - 7) = 28x; 1.2
B. 3x(7 - x) = 28; -7
C. 3x + 7x = 28; 4
D. 7x - 3x = 28; 7
Answer: D
Mathematics
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