Question

rezolvati in R ecuatiile va rog frumos

3-6x=2-4x

2x+(3-6x)=-17

2(x+1)=3(x-1)

1 supra lui 5 (2x-1)=4

2(x+1)=4-(1-2x)

2 supra lui 3 (4x-1 supra lui 3 )=1 sipra lui 9

Answer 1

3-6x=2-4x
-6x+4x=2-3
-2x=-1    (-1)
x=1/2

2x+(3-6x)=-17
2x+3-6x=-17
-4x=-17-3
-4x=-20       (-1)
x=20/4
x=5

2(x+1)=3(x-1)
2x+2=3x-3
2x-3x=-3-2
-x=-5    (-1)
x=5

1/5 (2x-1)=4
5(2x-1)=4
10x-5=4
10x=4+5
x=9/10

2(x+1)=4-(1-2x)
2x+2=4-1+2x
2x-2x=3-2
o=-1 nu are solutii 
x∈Ф

2 /3 (4x-1/3 )=1 /9
3(4x-1/3)=2x9
12x-3/3=18
12x=18+1
x=19/12