Question

4. Rezolvaţi în Z următoarele ecuații:
a) 5x – 24 = 3(x-16)
c) 3(2x + 2) – 5x + 4= 7(1-2) +24
e) 5(x + 4) -46-5)= 6(x+ 7) +3
g) 2(x-3) +207 – 20) = (r+ 5) + 31​

Answer 1

a) 5x – 24 = 3(x-16)

5x-24=3x-3*16

5x-24=3x-48

5x-3x=-48+24

2x= -24

x= -24/2

x= -12

c) 3(2x + 2) – 5x + 4= 7(1-2) +24

6x+6-5x+4=7-14+24

x=7-14+24-6-4

x=7

e) 5(x + 4) -46-5)= 6(x+ 7) +3

5x+20-46-5=6x+42+3

20-46-5-42-3=6x-5x

-76=x

x=-76

g) 2(x-3) +207 – 20) = (r+ 5) + 31​

2x-6+207-20=r+5+31

2x-r=5+31+6-207+20

2x-r=-145

x-r= -145/2

x-r=-72.5