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jolli1 [7]
3 years ago
11

3x-7y=6 2x+7y=4 Solve by elimination

Mathematics
2 answers:
artcher [175]3 years ago
7 0
3x-7y=6 \\
\underline{2x+7y=4} \\
3x+2x=6+4 \\
5x=10 \ \ \ |\div 5 \\
x=2 \\ \\
3x-7y=6 \\
3 \times 2-7y=6 \\
6-7y=6 \ \ \ |-6
\\ -7y=0 \ \ \ |\div (-7) \\
y=0 \\ \\
(x,y)=(2,0)
jeka57 [31]3 years ago
7 0
3x-7y=6\\
\underline{2x+7y=4}\\
5x=10\\
x=2\\\\
3\cdot2-7y=6\\
6-7y=6\\
-7y=0\\
y=0

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