Explicación paso a paso:
1)
2x-4=3
2x-4+4=3+4
2x=7
2x =7
2. 2
x=7
2
2).
5x-12=8
5x-12+12=8+12
5x=20
5x 20
5. 5
x=4
3)
5x+2=3x+7
5x+2-2=3x+7-2
5x=3x+5
5x-3x=3x+5-3x
2x=5
2x= 5
x=5
4)
3(x-1)=5(x+4)
3x-3+3=5x+20+3
3x=5+23
-2x=23
x=-. 23
-2
5)
-2(x+3)=4(x-1)
-2x-6=4x-4
-2x=4x+2
-6x=2
x=-. 1
3
6)
5(2x-4)=3(4x+6)
10x-20+20=12x+18+20
10x-12x=12x+38-12x
-2x=38
x=-19
7)
3x-2 =x
4. 2
(3x-2)•2=4x
6x-4+4=4x+4
6x=4x+4
2x = 4
x=2
8)
x = x-3
7. 4
x•4=7x-21
-3x= -21
9)
x-3 = 2x+1
4. 9
(x-3)•9=4(2x+1)
9x-27+27=8x+4+27
9x=8x+31
x=31
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Verified answer
Explicación paso a paso:
1)
2x-4=3
2x-4+4=3+4
2x=7
2x =7
2. 2
x=7
2
2).
5x-12=8
5x-12+12=8+12
5x=20
5x 20
5. 5
x=4
3)
5x+2=3x+7
5x+2-2=3x+7-2
5x=3x+5
5x-3x=3x+5-3x
2x=5
2x= 5
2. 2
x=5
2
4)
3(x-1)=5(x+4)
3x-3+3=5x+20+3
3x=5+23
-2x=23
x=-. 23
-2
5)
-2(x+3)=4(x-1)
-2x-6=4x-4
-2x=4x+2
-6x=2
x=-. 1
3
6)
5(2x-4)=3(4x+6)
10x-20+20=12x+18+20
10x-12x=12x+38-12x
-2x=38
x=-19
7)
3x-2 =x
4. 2
(3x-2)•2=4x
6x-4+4=4x+4
6x=4x+4
2x = 4
2. 2
x=2
8)
x = x-3
7. 4
x•4=7x-21
-3x= -21
x=7
9)
x-3 = 2x+1
4. 9
(x-3)•9=4(2x+1)
9x-27+27=8x+4+27
9x=8x+31
x=31
★ATT:DAVID†