Respostas
Resposta:
Explicação passo-a-passo:
d) 6x=20 x=20/6 e) 14x+4+12x+12=2 14x+12x+2-4-12 26x=-14 x=-14/26 f) -2x+6=18 -2x=12 x=-6 x= 12/-2 g) y=-182 h) -4x-2x=9-10 -8x=-1 x=1/8 i) 8x-12=5x+15 8x-5x=15+12 3x=27 x=27/3 x=9
Resposta:
d) 8x - 9=2x+11
8x-2x=11+9
6x=20
X=20÷6
x=3,33
e) 2. (7x+2)+12(x+1)=2
2.7x = 14x
2.2=4
12.x= 12x
12.1=2
14x+4+12x+12=2
14x+12x=2-4-12
26x=-14
x=26÷-14
x= -1,85
f) -2.(x-3)=18
-2.x= -2x
-2.-3=6
-2x-6=18
-2x=18+6
-2x=24
x=24÷-2
x=-12
g) y+4=-185
1y+4=-185
y=-185-4
y=-189
h)10-4x=9+2x
-4x-2x=9-10
-6x=-1
x=-1÷-6
x=0,16
i)4.(2x-3)=5.(x+3)
4.2x=8x
4.-3=-12
5.x=5x
5.3=15
8x-12=5x+15
8x-5x=15+12
3x=27
x=27÷3
x=9