Explicación paso a paso:
a) 2x+8=-4
2x= -4 -8
2x= 12
x= 12/2
×=6
b) 3-5a=7
a= 7 - 3-5
a= -1
c) 3x + 8= -5x
3x+5x= -8
8x= -8
x= -8/8
x= -1
d) 4x-2(3x-7)=5x
12x + 14 =5x
12x-5x=-14
7x= -14
x= -14/7
X= -2
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Explicación paso a paso:
a) 2x+8=-4
2x= -4 -8
2x= 12
x= 12/2
×=6
b) 3-5a=7
a= 7 - 3-5
a= -1
c) 3x + 8= -5x
3x+5x= -8
8x= -8
x= -8/8
x= -1
d) 4x-2(3x-7)=5x
12x + 14 =5x
12x-5x=-14
7x= -14
x= -14/7
X= -2