Question

Determine a raiz das equações a seguir
a)×+12=20
b)2×-3=9
c)×-1=15
d)5×10=30
e)2×+4=-1

Answer 1

olá !!!

$x+12=20\\x=20-12\\x=8\\\\b)\\2x-3=9\\2x=9+3\\2x=12\\x=12/2\\x=6\\\\c)\\x-1=15\\x=15+1\\x=16\\\\d)\\?\\\\e)\\2x+4=-1\\2x=-1-4\\2x=-5\\x=-5/2\\x=-2,5$

Espero ter ajudado

Att: Jovem Lendário