Question

what is c- 20 + (4c) c = 30

Answer 1

We are given the following expression:

$c-20+(4c)$

we are asked to determine the value of the expression when c = 30. To that, we replace the value of c in the expression for 30, like this:

$30-20+(4\times30)$

Now we solve the operation in the parenthesis:

$30-20+120$

Now we solve the subtraction:

$10+120$

Now we solve the last operation:

$130$

Therefore, the value of the expression when c = 30 is 130