Answer :

eu99li


x=3

ax-3x=4(x-3a)

3a-3*3=4(3-3a)

3a-9=12-12a

15a=21

a=1.4


x=3                                                                       check work. a=1.4, x=3

ax-3x=4(x-3a)                                                        ax-3x=4(x-3a)

3a-9=4(3)-12a                                                       3(1.4)-3(3)=4(3-3{1.4})

3a-9=12-12a                                                          4.2-9=4(3-4.2)

15a-9=12                                                               -4.8=4(-1.2)

15a=21                                                                  -4.8=-4.8

a=1.4