Rezolvati in multimea Q ecuatia ( ex 1 a, b, f, g ) . Dau 20 baluri si coroana . Va rog e urgent

a) x=46×3/2
x=23×3
x=69
b)x=18×(-4/3)
x=6×(-4)
x= -24
f)2x=5-(-2,6)
2x=7,6
x=7,6/2
x=3,8
g)x=3,6:1,2
x=36/10:12/10
x=36/10×10/12
x=3