Question

Rezolvati:
a) 3(x-1)=x+2
b) 3(x-1)=5x+2
c) 3(x-2)=4x
d) 5(x+3)=10
e) 3(2x+7)=9
f) 2(2-x)=x-5

Answer 1

a) 3x - 3 = x + 2
2x = 5
x = 5/2
b) 3x - 3 = 5x + 2
- 2x = 5
x = - 5/2
c) 3x - 6 = 4x
- x = 6
x = - 6
d) 5x + 15 = 10
5x = - 5
x = - 1
e) 6x + 21 = 9
6x = -12
x =- 12 : 6
x = - 2
f) 4 - 2x = x - 5
- 3x = - 9
x = 9 : 3
x = 3

Answer 2

a)3x-3=x+2
3x+x=2+3
4x=5
x=1.25
b)3x-3=5x+2
-2x=5
x=2.5
c)3x-6=4x
-x=6
x=-6
d)5x+15=10
5x=-5
x=-1
e)6x+21=9
6x=-12
x=-2
f)4-2x=x-5
-2x-x=-4-5
-3x=-9
x=-3