Question

-(-4.2w-7x-5.4)an equivalent expression by distributing the "-" sign outside the parentheses

Answer 1

$(4.2w+7x+5.4)$

1) Distributing the minus, is the same as distributing "-1". So we can write:

$\begin{gathered} -(-4.2w-7x-5.4)\text{ =-1}(-4.2w-7x-5.4) \\ \end{gathered}$

2) A -1, swaps the sign of all terms within the parentheses:

$(4.2w+7x+5.4)$

3) Hence this is the answer (above).