Resolva as equações do 1° grau
A) x-1=7-2x
B) x+1+2x=1-3x
C) 5+3y=-1+4y
D)-15-11x=-9-3x
E) 1-2y=7y+8
F)1045-x=729-3x
G)3.(x+1)+2.(2x-3)=5.(x-1)+8
H) 3.(x+3)-1=2
i)3.(x+2)=2.(x-7)
Soluções para a tarefa
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A) x-1=7-2x
x+2x=7-1
3x = 6
x = 6/3
x = 2
B) x+1+2x=1-3x
x+2x+3x=1-1
6x = 0
x= 0/6
x=0
C) 5+3y=-1+4y
3y-4y=-1-5
-y=-6 .(-1)
y=6
D)-15-11x=-9-3x
-11x+3x=-9+15
-8x=+6 .(-1)
8x=-6
x= -6/8
x = -0,75
E) 1-2y=7y+8
-2y-7y=8-1
-9y=7 .(-1)
9y=-7
y=-7/9
F)1045-x=729-3x
-x+3x=729-1045
2x=-316
x=-316/2
x=-158
G)3.(x+1)+2.(2x-3)=5.(x-1)+8
3x+3+4x-6=5x-5+8
3x+4x-5x=-5+8-3+6
7x-5x=6
2x=6
x=6/2
x=3
H) 3.(x+3)-1=2
3x+9-1=2
3x=2-8
3x=-6
x=-6/3
x=-2
i)3.(x+2)=2.(x-7)
3x+6=2x-14
3x-2x=-14-6
x=-20
x+2x=7-1
3x = 6
x = 6/3
x = 2
B) x+1+2x=1-3x
x+2x+3x=1-1
6x = 0
x= 0/6
x=0
C) 5+3y=-1+4y
3y-4y=-1-5
-y=-6 .(-1)
y=6
D)-15-11x=-9-3x
-11x+3x=-9+15
-8x=+6 .(-1)
8x=-6
x= -6/8
x = -0,75
E) 1-2y=7y+8
-2y-7y=8-1
-9y=7 .(-1)
9y=-7
y=-7/9
F)1045-x=729-3x
-x+3x=729-1045
2x=-316
x=-316/2
x=-158
G)3.(x+1)+2.(2x-3)=5.(x-1)+8
3x+3+4x-6=5x-5+8
3x+4x-5x=-5+8-3+6
7x-5x=6
2x=6
x=6/2
x=3
H) 3.(x+3)-1=2
3x+9-1=2
3x=2-8
3x=-6
x=-6/3
x=-2
i)3.(x+2)=2.(x-7)
3x+6=2x-14
3x-2x=-14-6
x=-20
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