 #1
chwala
Gold Member
 2,201
 285
 Homework Statement:

Solve the inequality;
$$\dfrac {7x+12} {x}≥ 3$$
 Relevant Equations:
 inequalities
##7x+12≥3x##
##7x−3x≥−12##
##4x≥−12##
→ ##x≥−3##
or ## 12/x≥4##
but by substituting say## x=−4## we see that it also satisfies the equation implying that my solution may not be correct.
##7x−3x≥−12##
##4x≥−12##
→ ##x≥−3##
or ## 12/x≥4##
but by substituting say## x=−4## we see that it also satisfies the equation implying that my solution may not be correct.
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