Question

3⋅(7a−2)−7⋅(3a+2)=−20

Answer 1

Ответ:

3⋅(7a−2)−7⋅(3a+2)=−20

21а-6−21а+14=−20

21а-21а=-20-14+6

а=12

Пошаговое объяснение:

Answer 2

Let's solve the equation step by step:

1. Distribute the terms inside the parentheses: 3*(7a - 2) - 7*(3a + 2) = -20

3 * 7a - 3 * 2 - 7 * 3a - 7 * 2 = -20

2. Simplify the terms: 21a - 6 - 21a - 14 = -20

3. Combine like terms: (21a - 21a) - (6 + 14) = -20

0 - 20 = -20

4. Solve the remaining equation: -20 = -20

The equation is an identity, meaning it holds true for all values of 'a.' Both sides of the equation are equal, so the solution is "for all real numbers 'a'."