Resolva a equação, considerando U = Q: 2X+ 10 = X - 30
- 8
- 40
14
9
- 13
- 8
- 40
14
9
- 13
1 Resposta
1_|
12x-4/6-8x-3/9=x+2x+5/3
mmc=>
6,9,3/3
2,3,1/2
1,3,1/3
1,1,1
mmc=>3.2.3=>3.6=18
12x-4/6-8x-3/9=x+2x+5/3
3.(12x-4)/18-2.(8x-3)/18=18x+6.(2x+5)/18
3.(12x-4)-2.(8x-3)=18x+6.(2x+5)
36x-12-16x+6=18x+12x+30
36x-16x+6-12=18x+12x+30
20x-6=30x+30
20x-30x=30+6
-10x=36
x=-36/10
x=(-36)÷2/10÷2
x=- 18/5
2_| balança ×××200g 100g 500g X
4x+200>500+100+x
4x+200>x+60
3_|
letra a :
4.(x+3)>2.(x-1)
4x+13>2x-2
4x-2x>-2-13
2x>-15
x>-15/2
letra b:
3.(x+2)>2.(2x+4)
3x+6>4x+8
3x-4x>8-6
-x>2.(-1)
x<-2
4_|
x+y=6.(-2)
2x-y=24.(1)
|
-2x-2y=-12
2x-y=24
|
(2x-2x)+(-2y-y)=24-12
(0)+(-3y)=12
-3y=12
y=12/-3
y=-4
x+y=6
x=6-y
x=6-(-4)
x=6+4
x=10
x=10 e y=-4
s={10,-4}
espero ter ajudado!
boa noite!
12x-4/6-8x-3/9=x+2x+5/3
mmc=>
6,9,3/3
2,3,1/2
1,3,1/3
1,1,1
mmc=>3.2.3=>3.6=18
12x-4/6-8x-3/9=x+2x+5/3
3.(12x-4)/18-2.(8x-3)/18=18x+6.(2x+5)/18
3.(12x-4)-2.(8x-3)=18x+6.(2x+5)
36x-12-16x+6=18x+12x+30
36x-16x+6-12=18x+12x+30
20x-6=30x+30
20x-30x=30+6
-10x=36
x=-36/10
x=(-36)÷2/10÷2
x=- 18/5
2_| balança ×××200g 100g 500g X
4x+200>500+100+x
4x+200>x+60
3_|
letra a :
4.(x+3)>2.(x-1)
4x+13>2x-2
4x-2x>-2-13
2x>-15
x>-15/2
letra b:
3.(x+2)>2.(2x+4)
3x+6>4x+8
3x-4x>8-6
-x>2.(-1)
x<-2
4_|
x+y=6.(-2)
2x-y=24.(1)
|
-2x-2y=-12
2x-y=24
|
(2x-2x)+(-2y-y)=24-12
(0)+(-3y)=12
-3y=12
y=12/-3
y=-4
x+y=6
x=6-y
x=6-(-4)
x=6+4
x=10
x=10 e y=-4
s={10,-4}
espero ter ajudado!
boa noite!
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