Resolver y comprobar cada una de las ecuaciones:
a) 3x-2(x+3)=x-3(x+1)
b) 4+x-4(1-x)+5(2+x)=0
c) 2x+7-2(x-1)=3(x+3)
d) 4(2x-7)-3(3x+1)=2-(7x)
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a) 3x - 2 (x + 3) = x - 3 (x + 1)
3x - 2x - 6 = x - 3x - 3
3x - 2x - x + 3x = -3 + 6
3x = 3 | : 3
x = 1
b) 4 + x - 4 (1 - x) + 5 (2 + x) = 0
4 + x - 4 + 4x + 10 + 5x = 0
x + 4x + 5x = -4 + 4 - 10
10x = - 10 | : 10
x = -1
c) 2x + 7 - 2 (x - 1) = 3 (x + 3)
2x + 7 - 2x + 2 = 3x + 9
2x - 2x - 3x = 9 - 7 - 2
- 3x = 0
esta ecuación es incompatible
d) 4 (2x - 7) - 3 (3x + 1) = 2 - 7x
8x - 14 - 9x - 3 = 2 - 7x
8x - 9x + 7x = 2 + 14 + 3
6x = 19 | :6
x = 19/6
x = 3 1/6
buenas tardes:3x-2(x+3)=x-3(x+1) ejercico(a)
: 3x-2x-6=x-3x-3
:3x-2x-x+3x=-3+6
:3x=3
:x=3/3=1
:x=1
comprobacion:3(1)-2(1+3=1-3(1+1)
:3-2-6=1-3-3
:-5=-5
ejercicio(b) 4+x-4(1-x)+5(2+x)=0
4+x-4+4x+10+5x=0
x+4x+5x=0+4-10
10x=-6
x=-6/10 simplifico entre 2 y obtengo:
x=-3/5
comprobacion:4+(-3/5)-4(1-(-3/5))+5(2+(-3/5))=0
:4+(-3/5)-4+4(-3/5)10+5(-3/5)=0
: -3/5+4(-3/5)+5(-3/5)=0+4-10
:10(-3/5)=-6
:-3/5=-6/10=-3/5
:-3/5=-3/5
ejercicio(c) 2x+7-2(x-1)=3(x+3)
2x+7-2x+2=3x+9
2x-2x-3x=9-7-2
-3x=0
x=0/3
x=0
comprobacion:2(0)+7-2(0-1)=3(0+3)
:0+7-0+2=0+9
:7+2=9
:9=9
ejercicio(d) 4(2x-7)-3(3x+1)=2-(7x)
8x-28-9x-3=-14x
8x-9x+14x=3+28
11x=31
x=31/11
comprobacion: 4(2(31/11-7))-3(3(31/11+1))=2-(7(31/11))
:8(31/11)-28-9(31/11)-3=-14(31/11)
:8(31/11)-9(31/11)14(31/11)=3+28
:11(31/11)=31
:31/11=31/11
espero haberte ayudado.