Expand the bracket−(7x−3)=−1x(7x−3)Apply a(b−c)=a×b+a×−c−1×(7x−3)=−1×7x−1x−3−x−=+ hence −1×−3=+3−1×(7x−3)=−1×7x−1×−3=−7x+35x−(7x−3)≤95x−7x+3≤9Simplify−2x≤9−3−2x≤6Divide both sides by - 2NOTE: When you divide by negative, the signs changes to the opposite directionCancel outx≥−3