Asked by Presley

Elimination using addition and subtraction:
1.
x - y = 1
x + y = 3

2.
-x + y = 1
x + y = 11

3.
x + 4y = 11
x - 6y = 11

4.
-x + 3y = 6
x + 3y = 18

PLEASE HELP!!!!
I NEED HELP ASAP!!!!
Answered by drwls
Either add or subtract one equation from the other to eliminate x.

For example. ADD the two equations in Problem 1. This results in 2x = 4, which requires that x = 2. Use either equation to get y.

You can certainly do the others yourself.
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