Question

9(0,5a-7b)-7(4a-5b)​

Answer 1

4,5а-63b-28a+35b= -23,5a-28b

Answer 2

To simplify this expression, we can use the distributive property of multiplication over addition/subtraction and combine like terms:

9(0.5a - 7b) - 7(4a - 5b) = 4.5a - 63b - 28a + 35b (distributing the 9 and -7) = (4.5a - 28a) + (-63b + 35b) (combining like terms) = -23.5a - 28b

Therefore, the simplified expression is -23.5a - 28b.