Question

2а-(а-(5+3а)), если а=5​

Answer 1

Ответ:

25.

Пошаговое объяснение:

Упростим данное выражение:

2а - (а - (5 + 3а)) = 2а - (а - 5 - 3а) = 2а - а + 5 + 3а = 4а + 5.

Если а = 5, то 4•5 + 5 = 25.

Answer 2

To find the value of the expression 2a-(a-(5+3a)) when a is equal to 5, we substitute a with 5 and evaluate the expression.

Let's substitute a = 5 into the expression:

2(5) - (5 - (5 + 3(5)))

Now, let's simplify the expression step by step:

2(5) - (5 - (5 + 3(5))) = 10 - (5 - (5 + 15)) = 10 - (5 - 20) = 10 - (-15) = 10 + 15 = 25

Therefore, when a = 5, the expression 2a-(a-(5+3a)) evaluates to 25.