rae297
rae297
19-06-2018
Mathematics
contestada
how and why does this equation -8-x=-3x equal x=4
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BlakeMATH
BlakeMATH
19-06-2018
because -8-(4)= -12, and -3(4) = -12
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clairebear11213
clairebear11213
19-06-2018
[tex] - 8 - x = - 3x \\ - 8 = - 3x + x \\ - 8 = - 2x \\ x = - \frac{ - 8}{ - 2} = 4[/tex]
First, we add x to both sides and simplify. Then, we divide both sides by -2
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