This week we learned about systems of linear equations.

There are four ways: 1. If you have a separate x or y, write the separate x or y as: x=.Y =.

2. I have minus 3y in both, and 3y is zero pair.I can just cancel out

3. If you don’t have the same x and y, and you don’t have minus 3y and 3y, you have to turn an x or a y into a positive or negative number.

4. Find the least common multiple.

And we also learned elimination and substitution.

Elimination: 4x+2y-31=0, -4x+6y-13=0. 4x and -4x can Directly to cancel.

Substitution: Let’s get an x or a y out.