Question

me pueden ayudar resolviendo las ecuaciones y comprobar
a) 3(x – 7) = 5(x – 1) – 4

b) 5(2 – x) + 3(x + 6) = 10 – 4(6 + 2x)

c) 3x + 8 – 5x – 5 = 2(x + 6) – 7x

d) 10(x – 2) = 1

Answer 1

a) 3(x – 7) = 5(x – 1) – 4

3x-21=5x-5-4

-12=2x

-6=x

*Comprobación*

3(x – 7) = 5(x – 1) – 4

3(-6-7)=5(-6-1)-4

3(-13)=5(-7)-4

-39=-39

b) 5(2 – x) + 3(x + 6) = 10 – 4(6 + 2x)

10-5x+3x+18=10-24-8x

6x=-42

x=-7

c) 3x + 8 – 5x – 5 = 2(x + 6) – 7x

3x+8-5x-5=2x+12-7x

-2x+3=12-5x

3x=9

x=3

d) 10(x – 2) = 1

10x-20=1

10x=21

x=21/10