Question

Resolva a equações
A)4y+9=y-6
B)5y+2y-3=3y+y
C)5(2+3y)=4-2(2y+5)
D)x/24-x/12=x-46
E)x-x/2-x/6=6
F)1/3=x/42

Answer 1

à) 4y+9=y-6


4y-y=-6-9
3y=-6-9
3y=-15
y= -15/3
y= -5

b) 5y+2y-3=3y+y
7y-3 = 4y
7y=4y+3
7y-4y=3
3y=3
y=3/3
y=1

c)5(2+3y)=4-2(2y+5)
10+15y= 4-4y-10
10+15y=4-10-4y
10+15y=-6-4y
15y+4y=-6-10
19y=-16
y=-16/19
y= -0.842105
d)x/24-x/12=x-46
MMC=24
x-24/24=24x-1104
x-2x=24x-1104
-x=24x-1104
-x-24x+1104
-25x+1104

e) x-x/2-x/6=6
multiplique os dois lados por 6
6x-6.x/2-6.x/6=6.6
6x-3x-x=36
2x=36
x=36/2
x=18

f) 1/3= x/42
1.42/3=x
42=3x
x=42/3
x=14