Question

3(28a+b)-73a+8b a+b=7

Answer 1

Раскроем скобки и приведём подобные слагаемые:

= 3 · 28а + 3 · b - 73a + 8b = (84a - 73a) + (3b + 8b) = 11a + 11b

Общий множитель 11 вынесем за скобки: = 11 · (a + b)

если a + b = 7

11 · (a + b) = 11 · 7 = 77

Ответ: 77.

Answer 2

To simplify the expression 3(28a+b) - 73a + 8b, we can use the given information that a + b = 7. Let's substitute the value of (a + b) into the expression and then simplify:

3(28a + b) - 73a + 8b

Now, substitute a + b with 7:

3(28a + b) - 73a + 8b = 3(28a + 7) - 73a + 8b

Next, distribute the 3:

= 84a + 21 - 73a + 8b

Now, combine like terms by combining the 'a' terms and the constant terms:

= (84a - 73a) + 21 + 8b

= 11a + 21 + 8b

So, the simplified expression is 11a + 21 + 8b.