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(i)
Find the truth set of
.
(ii)
Illustrate the answer in (i) on the number line.
Multiply both sides of the equation by 2 to get rid of the fraction.
Cancel out
x - 1 ≤ 1 + 2x
-1 - 1 ≤ 2x - x
-2 ≤ x
Bring the x to the left side and reverse the sign
x ≥ -2
ALTERNATIVELY
x - 2x ≤ 1 + 1
-x ≤ 2
Divide both sides by -1
-x/-1 ≤ 2/-1
NOTE: Whenever you divide by negative, you must reverse the sign
NOTE: The dot must be solid (filled) since it is greater or equal to