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OpenStudy (anonymous):
The difference between three times a number and seven is twenty. What is the number? a) 20/7 b) 13/3 c) 9 d) 27
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OpenStudy (cwrw238):
let number = x, then 3x - 7 = 20 Solve for x
OpenStudy (anonymous):
b?
OpenStudy (cwrw238):
No - if you are not confident with solving try substitution for example it cannot be d because 3*27 - 7 = 74 not 20
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