Question

10x-(-(5x+20))=5(3x+4)​

Answer 1

10х+5х+20=15х+20
10х+5х-15х=20-20
0=0

Answer 2

Let's solve the equation step by step:

$10x - \left(-(5x + 20)\right) = 5(3x + 4)$

1. Distribute the negative sign inside the parentheses: $10x + (5x + 20) = 5(3x + 4)$

2. Combine like terms on the left side: $10x + 5x + 20 = 5(3x + 4)$

3. Combine the x-terms: $15x + 20 = 5(3x + 4)$

4. Distribute the 5 on the right side: $15x + 20 = 15x + 20$

At this point, you'll notice that both sides of the equation are the same. This implies that the equation is an identity, which means it holds true for all values of $x$. In other words, there is no specific solution for $x$ because any value of $x$ will satisfy the equation.

So, the original equation $10x - \left(-(5x + 20)\right) = 5(3x + 4)$ is an identity.