DymMpobrie
DymMpobrie
30-12-2016
Mathematics
contestada
7 ( x - 12 )= -21 solve for x
Respuesta :
apologiabiology
apologiabiology
30-12-2016
divide botoh sides by 7
x-12=-3
add 12 to both sides
x+12-12=12-3
x+0=9
x=9
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