3 years ago

This doesn't makes sense can anyone explain? Test on Friday!!

Mathematics

1 answer:

Nitella [24]3 years ago

5 0

If you divide 4.2 by 0.02 you should get 210

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$\left\{\begin{array}{ccc}4x+7y=6\\6x+y=2&|multiply\ both\ sides\ by\ (-7)\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}4x+7y=6\\-42x-7y=-14\end{array}\right}\\.\ \ \ -38x=-8$

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