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Kobotan [32]
3 years ago
15

What is -2+6y=18 3y=15 ?

Mathematics
2 answers:
pashok25 [27]3 years ago
7 0
\left \{ {{-2+6y=18} \atop {3y=15}} \right.  \\ +2+2 \left \{ {{6y=20} \atop {3y=15}} \right. \\ /3/3 \left \{ {{6y=20} \atop {y=5}} \right.\\  /6/6 \left \{ {{y=3 \frac{1}{3} } \atop {y=5}} \right.
gavmur [86]3 years ago
6 0
-2+6y=18\ \ \  |add\ 2\ to\ both\ sides\\6y=20\ \ \ \ \ |divide\ both\ sides\ by\ 6\\y=\frac{20}{6}\\\\\boxed{y=\frac{10}{3}}\\---------------------\\\\3y=15\ \ \ \ \ |divide\ both\ sides\ by\ 3\\\\\boxed{y=5}
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