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Gi7182
@Gi7182
December 2019
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Calcule o valor de x nas equações abaixo
A)3x+15=3
B)-2x+2=-46
C)10x+8=18
D)5x-8=3x+12
E)13x-2=4x+7
F)8x+4x=-8x+13
G)-2x+14=8x+13
H)-8x+4=13x-38
I)-5x+4=5x+4
ME AJUDEM POR FAVOR
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larissataborda
A)
3x - 15 = 3
3x = 3 + 15
3x=18
3x/3 = 18/3
x = 6
0 votes
Thanks 3
Luizkam
A)3x+15=3
3x+15=3
3x=3-15
3x= -12
X= -12/3
X=-4
B)-2x+2=-46
-2x+2=-46
-2x=-46-2 multiplica por (-1)
2x=46+2xx
x=48/2
X=28
C)10x+8=18
10x+8=10x
10x=18-8
10x=10
X=10/10
X=1
D)5x-8=3x+12
5x-8=3x+12
5x-3x=12+8
2x=20
X=20/2
X=10
E)13x-2=4x+7
13x-2=4x+7
13x-4x=7+2
9x=9
x=9/9
X=3
F)8x+4x=-8x+13
8x+4x+8x=13
20x=13
X=13/20
G)-2x+14=8x+13
-2x+14=8x+13
-2x-8x=13-14 multiplica por (-1)
2x+8x=14-13
10x=1
X=1/140x0
H)-8x+4=13x-38
8x+4=13x-38
8x-13x=-38-4
-5x=-42 multiplica por (-1)
5x=42
X=42/5
I)-5x+4=5x+4
-5x+4=5x+4
-5x-5x=4-4 mmultiplica por (-1)
5x+5x=4-4
10x=0
X=10
1 votes
Thanks 2
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3x - 15 = 3
3x = 3 + 15
3x=18
3x/3 = 18/3
x = 6
3x+15=3
3x=3-15
3x= -12
X= -12/3
X=-4
B)-2x+2=-46
-2x+2=-46
-2x=-46-2 multiplica por (-1)
2x=46+2xx
x=48/2
X=28
C)10x+8=18
10x+8=10x
10x=18-8
10x=10
X=10/10
X=1
D)5x-8=3x+12
5x-8=3x+12
5x-3x=12+8
2x=20
X=20/2
X=10
E)13x-2=4x+7
13x-2=4x+7
13x-4x=7+2
9x=9
x=9/9
X=3
F)8x+4x=-8x+13
8x+4x+8x=13
20x=13
X=13/20
G)-2x+14=8x+13
-2x+14=8x+13
-2x-8x=13-14 multiplica por (-1)
2x+8x=14-13
10x=1
X=1/140x0
H)-8x+4=13x-38
8x+4=13x-38
8x-13x=-38-4
-5x=-42 multiplica por (-1)
5x=42
X=42/5
I)-5x+4=5x+4
-5x+4=5x+4
-5x-5x=4-4 mmultiplica por (-1)
5x+5x=4-4
10x=0
X=10