Question : For what values of and , the simultaneous equations
x + y + z = 6
x + 2y + 3z = 10
x + 2y + z =
Are you honestly saying that you do not know what the constant term is in and ? If that's the case then sorry but there's nothing educational to be gained by someone writing a solution for you to simply copy.
The cold hard fact (based on this thead and others) is that you need to go back and thoroughly revise basic material (such as polynomials) because the questions you are asking (and no doubt other questions you have yet to meet or ask) assume you are competent with that material.
Then read threads like this one again.
Infinite solutions? Unique solution? No solution?