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Re: What is the value of y-x^2-x? [#permalink]
25 Oct 2013, 01:04
The explanation about linear equation is not clear
If you have n distinct linear equations and n variables then you can solve for them. "Distinct linear equations" means that no equation can be derived with the help of others or by arithmetic operation (by multiplication, addition, ...).
We have two distinct linear equations: \(y = -3x\) and \(y = -4(x + 1)\). Solving gives: x=-4 and y=12.