Respuesta:
Explicación paso a paso:
a) 3(x+2)=12
1)
3x+6=12
3x=12-6
3x=6
x=6/3
x=2
2)
x+2=12/3
x+2=4
x=4-2
b) (12x-8):2=14
6x-4=14
6x=14+4
6x=18
x=18/6
x=3
(12x-8):2=14
12x-8=14*2
12x-8=28
12x=28+8
12x=36
x=36/12
x=12/4=3
c) (2x-5)*4=20
8x-20=20
8x=20+20
8x=40
x=40/8
x=5
2x-5=20/4
2x-5=5
2x=5+5
2x=10
x=10/2
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Respuesta:
Explicación paso a paso:
a) 3(x+2)=12
1)
3x+6=12
3x=12-6
3x=6
x=6/3
x=2
2)
x+2=12/3
x+2=4
x=4-2
x=2
b) (12x-8):2=14
1)
6x-4=14
6x=14+4
6x=18
x=18/6
x=3
2)
(12x-8):2=14
12x-8=14*2
12x-8=28
12x=28+8
12x=36
x=36/12
x=12/4=3
c) (2x-5)*4=20
1)
8x-20=20
8x=20+20
8x=40
x=40/8
x=5
2)
2x-5=20/4
2x-5=5
2x=5+5
2x=10
x=10/2
x=5