Question

$40 + 30x - x$

Answer 1

Hi there

Your answer is :-

$40 + 30x - x$

$40 + 29x \: ( Ans )$


Thank You

Answer 2

Since 30x and x has same variable, we can subtract them.
x doesn't has a constant here means it's 1.

So 30x - x
= (30-1) x
= 29x


Hence your answer is 40 + 29x

Hope it helps dear friend ☺️✌️