Solve 0.5a+0.5=0.9a-25

Answer: a = - 250

Step-by-step explanation:

1. Solve the left side: 0.5a + 0.5a = a

2. Subtract 0.9a to the other side which gives: a - 0.9a = - 25

3. Solve the left side again: 0.1a = - 25

4. Divide 0.1a to the right side to isolate a: a = - 25/0.1

5. Now divide - 25 / 0.1 to get a = - 250

a=63.75

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.