First, let's simplify the expression step by step:
Therefore, the final simplified expression is -6.3/7.
First, let's simplify the expression step by step:
3/7(-0.54) = -0.54 * 3/7 = -1.62/7-1.62/7 - 1.56 * 3/7 = -1.62/7 - 4.68/7 = -6.3/7Therefore, the final simplified expression is -6.3/7.