Posted by unknown on .
if x3y=8 and y=2x+1, then x= ???

Algebra1 
DrBob222,
Substitute 2x+1 into equation 1 for y and solvee for x.

Algebra1 
unknown,
huh??

Algebra1 
~christina~,
x3(2x+1)=?
since y=2x+1 
Algebra1 
unknown,
x3y=8 and y=2x+1, then x= ???

Algebra1 
Marie,
if x3y=8 and y=2x+1, then x=

Algebra1 
~christina~,
x3(2x+1)=??
you have to solve it by multiplying the 3 over and then just adding the x's and the #'s without the x's
Nobody's going to give you all the answers. 
Algebra1 
unknown,
im not asking for da answer I juss don't know how to do it.... im confused....
so i multiply the 3&1 ( right??)
then i add the #'s with x's... 1x + 2x which is 3x^2.... see i don't know wat im doing.... becasue the multiply choices are single digits or fractions.... 
Algebra1 
~christina~,
well
x3(2x+1)=
multiply the 3 and the 2x+1
then add 
Algebra1 
unknown,
thank u..... & sorry if i was rude... i was just confused...