Question

Cum se calculeaza : 1. -3x+2=-7 2. 4x+3=x-15 3. 2x-1=-7 4x_16 <0 4. -3x+13>0

Answer 1

-3x+2=-7
-3x  =-7 - 2 
-3x = -9
x = -9: - 3
x = 3 

 4x+3=x-15
4x - x = -15 - 3 
3x = -18 
x = -18: 3 
x = - 6

 2x-1=-7
2x = -7 + 1
2x =- 6
x = - 6 : 2
x = -3

4x-16 <0
4x < 16 
x < 16 : 4 
x < 4


-3x+13>0
- 3x > -13 
x > -13 : 3 
x < 4,(3)