posted by pam .
Solve the systems of equations by elimination.
1. -2x+y=7 2. 2x+y=-9
3. 7x+3y=-1.5 4.2x-3y=-0.27
Tutors do not do your homework.
The only way you will learn is by trying to solve these yourself.
See your first post/problem below.
I worked out one problem in detail. Follow this example to do all these problems.
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