Question

2. Раскройте скобки.
a) (6 + a) * 7;
6) 5 (10-x)

Answer 1

• a) 7a + 42
• b) -5x + 50

Explanation:

a) (6 + a) × 7 = ?

→ (6 + a) × 7

→ (6 × 7) + (a × 7)

→ 42 + 7a

→ 7a + 42

The answer is 7a + 42.

b) 5(10 - x) = ?

→ 5(10 - x)

→ (5 × 10) - (5 × x)

→ 50 - 5x

→ -5x + 50

The answer is -5x + 50.