Answer:
Explanation:
You can solve 6a + 6c =126 for either a or c, but until you have a second equation in either a or c or both, you cannot find the values of a and c.
6a + 6c =126 reduces to 6(a + c = 23), or just a + c = 23. Then either a = 23 - c or c = 23 - a, but we cannot find a or c as a specific numeric value.