Question

1,2(4/9a-0,5b)-0,7×(1/7a-0,5b)

Answer 1

Решение на фотографии.

Answer 2

To simplify the given expression:

1,2(4/9a - 0,5b) - 0,7 × (1/7a - 0,5b)

First, let's simplify the expressions inside the parentheses:

4/9a - 0,5b = (4/9)a - 0,5b 1/7a - 0,5b

Now, we can distribute the 1.2 to the terms inside the first set of parentheses:

1,2 × (4/9)a - 1,2 × 0,5b - 0,7 × (1/7a - 0,5b)

Simplifying further:

(4/9) × 1,2a - 0,5 × 1,2b - 0,7 × (1/7a - 0,5b)

Now, let's simplify the expression inside the second set of parentheses:

1/7a - 0,5b = (1/7)a - 0,5b

Substituting the simplified expression back into the main expression:

(4/9) × 1,2a - 0,5 × 1,2b - 0,7 × ((1/7)a - 0,5b)

Simplifying further:

(4/9) × 1,2a - 0,5 × 1,2b - 0,7 × (1/7)a + 0,7 × 0,5b

Now, we can simplify each term separately:

(4/9) × 1,2a = (4/9) × 1,2 × a = 0,533a 0,5 × 1,2b = 0,6b (1/7)a = (1/7) × a = 0,143a 0,7 × 0,5b = 0,35b

Substituting these simplified terms back into the expression:

0,533a - 0,6b - 0,7 × 0,143a + 0,35b

Now, we can combine like terms:

0,533a - 0,7 × 0,143a - 0,6b + 0,35b

0,533a - 0,1a - 0,6b + 0,35b

Simplifying further:

0,433a - 0,25b

Therefore, the simplified expression is 0,433a - 0,25b.