a) -2x+6+6-3x = x
-5x+12= x
-5x-x = -12
-6x = -12
x= 2
c) 32-5x-10=V2-42
22-5x = V2-42
22-5x+42 = V2
64-5x = V2
5x = 64-V2
x= (64-V2)/5
b) 3x+6-5x+5 = -3
-2x+11= -3
-2x = -14
x = 7
d) rationalizezi pe 713/V7 cu V7 = 713V7/7
2V2x+2x+V2+1 = 713V7/7 amplifici tot ce este in partea stanga cu 7
14V2x + 14x+7V2+7 = 713V7
7(V2+1)+14x(V2+1) = 713V7
(V2+1)(7+14x) = 713V7
7+14x = 713V7/(V2+1) rationalizezi fractia cu V2-1
7+14x = (713V14-713V7)/(2-1)
14x = 713V14-713V7 -7
x =(713V14-713V7-7)/14