Question

resolva a seguinte inequação (1/9) x+2 ≤81

Answer 1

1/9 x 9x/9 + 18/9 ≤9/9 <=>
<=> 1 x 9x + 18 ≤ 9 <=>
<=> 1 x 18 - 9 ≤ -9x <=>
<=> 18 - 9 ≤ -9x <=>
<=> 9 ≤ -9x <=>
<=> 9x ≥ 9 <=>
<=> x ≥ 9/9 <=>
<=> x ≥ 1