Question

10- Determine o valor de x nos casos abaixo
a) X- 7 = 12
b) X + 12 = 30
c) X-13 = 20
d) 2x - 2 = 8
e) 3x - 15 = 45​

Answer 1

olá !!!

$a)x-7=12\\x=12+7\\x=19\\\\b)x+12=30\\x=30-12\\x=18\\\\c)x-13=20\\x=20+13\\x=33\\\\d)2x-2=8\\2x=8+2\\2x=10/2\\x=5\\\\e)3x-15=45\\3x=45+15 \\3x=60\\3x=60/3\\x=20$

espero ter ajudado

Att: Jovem Lendário