Question

2,8(5b-6c)-(7b-8a)•1,2

Answer 1

Ответ:

2,8(5b-6c)-(7b-8a)1,2=

=(14b-16,8c)-(8,4b-9,6a)=

14b-16,8c-8,4b+9,6a=9,6a+5,6b-16,8c

Answer 2

It looks like you have an expression that involves multiplication and subtraction of terms with variables. Let's simplify the expression step by step:

Given expression: 2.8(5b - 6c) - (7b - 8a) • 1.2

Step 1: Distribute the multiplication on the left side of the expression: = 14b - 16.8c - (7b - 8a) • 1.2

Step 2: Distribute the multiplication on the right side of the expression: = 14b - 16.8c - 8.4b + 9.6a

Step 3: Combine like terms: = (14b - 8.4b) - 16.8c + 9.6a - 8.4b = 5.6b - 16.8c + 9.6a - 8.4b

Step 4: Combine like terms again: = (5.6b - 8.4b) - 16.8c + 9.6a = -2.8b - 16.8c + 9.6a

So, the simplified expression is: -2.8b - 16.8c + 9.6a