Question

Me ajudem: Equações!!!
A) 3x + 10 = 4x + 8
B) 6x - 18= 0
C) x+ 5 = 12
D) 6x= 6
E) 13- x/2* = 25/2*
F) 2(x+3) =30
G) 8-2(x+5) = 5
H) 3(y-1) -4(y-2) =6
I) 2(5x-1) = 27
J) 2x -3(x-1) = 8-2
K) 5/2*x- 1/4*= 8
L) y/3* + y+1/2*= 5/6+ y

Answer 1

Olá,

a)3x-4x=-10+8->-x=-2 -> x=2
b)6x=18->  x=3
c) x=12-5 -> x=7
d)6x=6 -> x=1
e)25/2+x/2=13 -> 25+x=26 ->  x=1
f) 2x+6=30 -> x=24/2 -> x=12
g) 8-2x-10=5 ->-2x-2=5 -> x= -7/2
h)3y-3-4y-8=6 ->-y-11=6 -> y=-17
i)10x-2=27-> x=29/10
j)2x-3x+3=6 ->-x=3 -> x=-3
k)5x/2-1/4=8 -> 5x/2=33/4 -> 20x=66-> x=33/10
l)4y/3+1/2=(5+6y)/6->8y+3=6y+5 -> 2y=2 -> y=1

Espero ter ajudado. Boa noite :)

Answer 2

A) 3x + 10 = 4x + 8
10-8= 4x-3x
2=x

B) 6x - 18= 0
6x=18
x=18/6
x=3

C) x+ 5 = 12
x = 12-5
x=7

D) 6x= 6
x=6/6
x=1

E) 13- x/2* = 25/2*
26-x=25
26-25=x
x= 1

F) 2(x+3) =30
2x+6=30
2x = 30-6
x=24/2
x=12

G) 8-2(x+5) = 5
8-2x-10 = 5
-2x = 5 +2
-x = 7/2
-x = 3,5 × (-1)
x = -3,5

H) 3(y-1) -4(y-2) =6
3y-3-4y+8=6
-3+8-6=y
y = -1

I) 2(5x-1) = 27
10x -2=27
10x = 29
x = 29/10
x = 2,9

J) 2x -3(x-1) = 8-2
2x - 3x +3 = 6
-x = 3 × (-1)
x = -3

K) 5/2*x- 1/4*= 8
Não entendi em função do que está o x aqui

L) y/3* + y+1/2*= 5/6+ y
2y+y+3=5+y
2y= 2
y = 1