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OpenStudy (anonymous):
Solve -3x < 21
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OpenStudy (anonymous):
make x the subject of the formula, so divide by 3 both sides leaving x alone on the left hand side. So 21/-3 will give the value of x as -7.
OpenStudy (anonymous):
Ok. There is a small trick to this one. When you divide by a negative number, remember how the sign flips? -3x < 21 x > 21/-3 x > ?
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