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Anit [1.1K]
3 years ago
6

Use substitution to solve the system of equations.

Mathematics
2 answers:
polet [3.4K]3 years ago
8 0
The answer is (3,-6)
murzikaleks [220]3 years ago
4 0
X-3*(-2x)=21
x+6x=21
7x=21
X=21/7
X=3
Now you substitute x=3 in the other equation
Y=-2*3
Y=-6
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