-5+(3x+4)-12+9x
3(x+5)-2=(x+12)
3(x+2}=15
-2m(-m+2)=3(2m+1)
12m+3(m-1)=-2(m+1)+12
2(x-1)=1
-3(m+2)=1
2(x+2)=12
m=-3(m-4)
2(m+5)=-3(m-5)
-2(y+4)=-7+9(y-1)
5(x-4)=-4+9(x-1)
-5(x-4+4=2(2x-2)+9
-2(m-5)+3m=-(m+2)-7
-(x+5)-6=-9(x-3)-2
X-7+2(x-4)=-3(x+2)-8
Respostas
Resposta:
Explicação passo-a-passo:
a) OK
-5+(3x+4) = -12+9x
-5 + 3x + 4 = - 12 + 9x
-1+3x = - 12 + 9x
-1+12 = 9x - 3x
11 = 6x
6x = 11
x = 11/6
B) OK
3(x+5)-2=(x+12)
3x+15 - 2 = x+12
3x+13 = x + 12
3x - x = 12 - 13
2x = - 1
x = - 1/2
C) OK
3(x+2}=15
3x+6= 15
3x = 15 - 6
3x = 9
x = 9/3
x = 3
D)OK
-2m + (-m+2)=3(2m+1)
-2m - m + 2 = 6m +3
- 3m + 2 = 6m + 3
2-3 = 6m + 3m
-1 = 9m
9m = - 1
m = - 1/9
E) ok
12m+3(m-1)=-2(m+1)+12
12m+3m-3= -2m-2+12
15m - 3 = - 2m +10
15m + 2m = 10+3
17m = 13
m = 13/17
F) OK
2(x-1)=1
2x-2= 1
2x = 1+2
2x = 3
x = 3/2
G) OK
-3(m+2)=1
-3m - 6 = 1
-3m = 1 + 6
-3m = 7 (-1)
3m = - 7
m = -7/3
H) OK
2(x+2)=12
2x+4= 12
2x = 12 - 4
2x = 8
x = 8/2
x = 4
I) OK
m=-3(m-4)
m = - 3m+12
m+3m = 12
4m = 12
m = 12/4
m = 3
J) OK
2(m+5)=-3(m-5)
2m+10 = - 3m + 15
2m+3m = 15 - 10
5m = 5
m = 5/5
m = 1
L) OK
-2(y+4)= - 7 +9.(y - 1)
-2y - 8 = - 7 + 9y - 9
- 2y - 8 = - 16 + 9y
16 - 8 = 9y + 2y
8 = 11y
11y = 8
y = 8/11
M) OK
5(x-4) = -4+9(x-1)
5x-20 = - 4+9x-9
5x-20= -13 +9x
- 20 + 13 = 9x - 5x
7 = 4x
4x = 7
x = 7/4
N) OK
-5(x-4) +4 = 2(2x-2)+9
-5x+20+4= 4x-4+9
-5x + 24 = 4x + 5
24 - 5 = 4x+ 5x
21 = 9x
9x = 21
x = 21/9
O) OK
-2(m-5)+3m=-(m+2)-7
-2m+10+3m = -m-2 - 7
m+10 = -m - 9
m+m = -9-10
2m= - 19
m = - 19/2
P) OK
-(x+5)-6=-9(x-3)-2
-x-5-6 = -9x+27 - 2
-x - 11 = -9x + 25
-x + 9x = 25 + 11
8x = 36 (:4)
2x = 9
x = 9/2
Q) OK
X-7+2(x-4)= -3(x+2)-8
X-7+2x-8 = - 3x - 6 - 8
3x - 15 = - 3x - 14
3x+3x= - 14 + 15
6x = 1
x = 1/6