Question

dadas as seguintes sentencas matematica abaixo:
a- x+9<21
b- y+5= 0
c - 1/3 x + 2/5 x+ 1/2

Answer 1

a) x + 9 < 21
x < 21 - 9
x < 12
b) y + 5 = 0
y = 0 - 5
y = - 5
c) 1/3x + 2/5x + 1/2
MMC de 3, 5 e 2 = 30
1x/3/10 + 2x/5/6 + 1/2/15
10x + 12x + 15 = 0
22x = -15
x = - 15/22