Seudónimo Seudónimo

12-07-2014
Mathematics

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what value of a makes the equation true? 9a+2=4a-18

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mariamikayla mariamikayla

12-07-2014

[tex]9a+2=4a-18 \\9a-4a= -18-2 \\ 5a= -20 |:5 \\a= -4[/tex]

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Аноним Аноним

12-07-2014

[tex]9a+2=4a-18\ \ \ \ /-2\\\\9a=4a-20\ \ \ \ /-4a\\\\5a=-20\ \ \ \ /:5\\\\a=-4[/tex]

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