Question

(8,7a-5.1b+1,3)-(2,9a-4,2b)+(0,9b-5,8a)​

Answer 1

На фото все расписала

Answer 2

It looks like you're trying to perform some calculations with expressions involving variables "a" and "b". The expression you've provided seems to involve addition and subtraction of terms with coefficients and variables. Let's break down the calculation step by step:

Given Expression: (8,7a - 5,1b + 1,3) - (2,9a - 4,2b) + (0,9b - 5,8a)

Step 1: Distribute the negative sign to the terms inside the second parentheses: (8,7a - 5,1b + 1,3) - 2,9a + 4,2b + (0,9b - 5,8a)

Step 2: Group the terms with like variables together: (8,7a - 2,9a) + (-5,1b + 4,2b + 0,9b) + (1,3 - 5,8a)

Step 3: Perform the arithmetic operations within each group: 5,8a + (-0,9b) + (1,3 - 5,8a)

Step 4: Combine like terms: 5,8a - 0,9b + 1,3 - 5,8a

Step 5: Simplify: -0,9b + 1,3

Final Result: -0,9b + 1,3

So, the simplified expression is: -0,9b + 1,3