Question

(7-2xy)-(-4)-8xy= -3(4-b)+3(-b-3)-8(-0,6+b)=

Answer 1

(7-2xy)-(-4)-8xy = 7-2xy+4-8xy = 11-10xy

-3(4-b)+3(-b-3)-8(-0,6+b) = -12+3b-3b-9+4,8-8b = -16,2-8b

Answer 2

Вот.
должно быть правильно

Answer 3

Let's simplify the given expression step by step:

1. Simplify the expression within the first set of parentheses: (7 - 2xy) - (-4) - 8xy

   This becomes: 7 - 2xy + 4 - 8xy

2. Combine like terms: (7 + 4) - 2xy - 8xy

   Simplify the constants: 11 - 10xy

3. Now, let's simplify the expression within the second set of parentheses: -3(4 - b) + 3(-b - 3) - 8(-0.6 + b)

   Distribute the -3 and 3: -12 + 3b - 3(-b) - 3(-3) + 4.8 - 8b

   Simplify further: -12 + 3b + 3b + 9 + 4.8 - 8b

4. Combine like terms: (-12 + 9 + 4.8) + (3b + 3b - 8b)

   Simplify the constants: 1.8 - 2b

Now you have simplified both parts of the expression:

1. 11 - 10xy
2. 1.8 - 2b

So, the final expression is: 11 - 10xy + 1.8 - 2b

You can combine these terms further if needed:

11 + 1.8 - 10xy - 2b

This is the simplified expression.