Question

Rezolvați ecuațile:
1) 3x – 6 = 2x + 1
2) 7 – 2x = 4x + 1
3) 6x – 1 = x + 9
4) 3 – 2x = x + 6
5) 9x + 1 = 2x + 15
6) 10x – 1 = 3x + 20
7) 12x – 7 = 10x + 1
8) 5 – 17x = 5x – 39
9) 18x – 9 = 6x + 27
10) 9x – 1 = 6x + 11
11) 20x + 5 = 7x – 21
12) 31x – 4 = 17x + 10

Answer 1

Răspuns:

• $3x-6=2x+1$ $=>3x=2x+7$ $=>3x-2x=7=>x=7$

• $7-2x=4x+1$ $=>7=6x+1$$=>6x=-6 =>x=-1$

• $6x-1=x+9=>6x=x+10$ $=>6x-x=10=>5x=10=>x=2$

• $3-2x=x+6=>3=3x+6 =>3x=-3=>x=-1$

• $9x+1=2x+15 =>9x=2x+14 =>7x=14=>x=2$

• $10x-1=3x+20 =>10x=3x+21=>7x=21=>x=3$

• $12x-7=10x+1 =>12x=10x+8 =>2x=8=>x=4$

• $5-17x=5x-39 =>44-17x=5x=>44=22x=>x=2$

• $18x-9=6x+27=>18x=6x+36=>12x=36=>x=3$

• $9x-1=6x+11=>9x=6x+12=>3x=12 =>x=12:3=>x=4$

• $20x+5=7x-21=>20x+26=7x=>7x-20x=26=>-13x=26=>x=-2$

• $31x-4=17x+10=>31x=17x+14=>14x=14=>x=1$