January 2020 2 133 Report
Observe a resoluçao da equaçao que marcio fez na prova de matematica, sublinhe os erros e reescreva corretamente a equaçao


3(-x-4)=-7x+ 16
3x-12=-7x+ 16
3x+7x=+16+ 12
10=+ 28
x=+28= + 28 s = { +28 }
---- ---- -----
-10 10 10
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