Algebra-1

To solve the equation 20 - r + 30 = r - 10 for r, we can follow these steps:

1. First, let's simplify the equation by combining like terms:

50 - r = r - 10

2. To isolate the variable r, we can add r to both sides of the equation:

50 - r + r = r - 10 + r

Simplifying:

50 = 2r - 10

3. Next, let's isolate the ter...