Question

Rezolvati ecuatiile in R:
3x+1=2x+5
2x-3=3x+7
8x-1=6x-9
4x+11=7x+2
5x+2= -2x+19
3-2x=3-4x
3x+10= -3+5x
Va rog!Mulțumesc!

Answer 1

3x+1=2x+5 ⇒ 3x - 2x = 5 - 1 ⇒ x = 4

2x-3=3x+7 ⇒ 2x - 3x = 7 + 3 ⇒ x = - 10 

8x-1=6x-9 ⇒ 7x = 6x - 9 ⇒ 7x - 6x = - 9 ⇒ x = - 9

4x+11=7x+2 ⇒ 4x - 7x = 2 - 11 ⇒ - 3x = - 9 ⇒ x  = 3

5x+2= -2x+19 ⇒ 5x + 2x = 19 - 2 ⇒ 7x = 17 ⇒ x = 17/7

3-2x=3-4x ⇒ - 2x = - 4x ⇒ - 2x + 4x = 0 ⇒ 2x = 0 ⇒ x = 0 

3x+10= -3+5x ⇒ 3x - 5x = - 3 - 10 ⇒ - 2x = - 13 ⇒ x = 13/2

Answer 2

3x-2x= 5-1 => x=4
-x=4 => x=-4
8x-6x= -9+1=> 2x=-8 => x=-8/2 => x=-4
4x-7x = 2-11=> -3x=-9 =>x=3
7x=19-2=>7x= 17 =>x=17/7
2x=0=>x=0
-2x=-13=>x=13/2