Jonahrosario03
15.10.2019 •
Mathematics
Solve the system by using the combination method
4x+9y=7
4x-9y=9
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Ответ:
To use the combination method, add all the values of the two equations together to cancel out one of the variables
4x+4x+9y-9y=7+9
8x=16
8x/8=16/8
x=2
4(2)+9y=7
8+9y=7
8-8+9y=7-8
9y=-1
y=-
Ответ:
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Step-by-step explanation:
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