|
Answering Algebra
| |
Let's see how you got on:
- y - 4 = 10
Add 4 to both sides: y - 4 + 4 = 10 + 4
Answer: y = 14
- 17 - b = 5
Add b to both sides: 17 - b + b = 5 + b
So: 17 = 5 + b
Subtract 5 from each side: 17 - 5 = 5 + b - 5
Answer: 12 = b
- 50 - 2a = 30
Add 2a and subtract 30 from each side:
50 - 2a + 2a - 30 = 30 + 2a - 30
50 - 30 = 2a
20 = 2a
Answer: a = 10
|
Once you get used to this, you don‘t need to write all the steps given above:
e.g. y - 4 = 10
y = 10 + 4 = 14
|