Elsa and Olaf's teacher gave them a system of linear equations to solve. They
each took a few steps that led to the systems shown in the table below.
1, Systems
quivalent
tions and the
hod
Teacher
5x + 3y = -1
stems of
with elimination
43 - 9y = 8
Elsa
method
tems of linear
4.2 - 9y = 8
Olaf
15x + 9y = -3
4x - 9y = -5
9x - y = 7
cample:
systems of
Which of them obtained a system that is equivalent to the teacher's system?
Remember that two linear systems are "equivalent" if they have the same solution.
kample: non-
systems of
Choose 1
t systems of
review
~
Only Elsa
® Only Olaf
lutions to sys...
Both Elsa and Olaf