How would you do 3/10 x =3/5 =1? I know the answer is 4/3, but I can't understand how you would reach this answer. Could anybody explain in

I think that you typed something incorrectly because you have two equal signs in this equation. 

Was the original equation:  3/10x + 3/5 = 1 ?

If so, I would do it this way:

I would get rid of the denominators by multiplying both sides of the equation by 10.

10( 3/10x + 3/5 )  =  10(1)                       Multiply both sides by 10.

10( 3/10 ) + 10( 3/5 )  =  10                     Use the distributive property.

3 x + 6  =  10                                           Simplify.

3x  + 6 - 6  =  10 - 6                                 To get rid of the term '+ 6' subtract 6 from both sides.

3x  =  4                                                    Simplify.

3x / 3  =  4 / 3                                          To get rid of the 3 times x, divide both sides by 3.

x  =  4/3                                                   Simplify.