3.4x=2.1x+3.9 what is x

x = 3

Step-by-step explanation:

Step 1: Subtract 2.1x from both sides.

1.3x=3.9

Step 2: Divide both sides by 1.3

1.3x/1.3=3.9/1.3

x=3

Hope this helps!

Also can I have Brainliest please?

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3