Question

If the solution to the equation is x = 3 find the value of a
ax-3x=4(x-3a)

Answer 1

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

Answer 2

x=3

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

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

3a-9=12-12a

15a=21

a=1.4