Hey there!
[tex]Answer:\boxed{-x+-1}[/tex]
[tex]Explanation:[/tex]
[tex]4(5-2x)-21+7x[/tex]
Let's start off by distributing.
[tex](4)(5)+(4)(-2x)+-21+7x\\20+-8x+-21+7x[/tex]
Now in our second/last step, we will combine like terms.
[tex]20+-8x+-21+7x\\(-8x+7x)+(20+-21)\\-x+-1[/tex]
[tex]\boxed{-x+-1}\text{ is your answer.}[/tex]
Hope this helps!
[tex]\text{-TestedHyperr}[/tex]
