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+3 5x−(7x−3)≤9 5x−7x+3≤9 Simplify −2x≤9−3 −2x≤6 Divide both sides by - 2 NOTE: When you divide by negative, the signs changes to the opposite direction Cancel out x≥−3