If you expand this equation first You get -4u+6+3u=3u+24
And if you simplify that you get: -u+6=3u+24 Now you need to solve this equation to find u
First bring 3u to the other side to -u-3u (the positive changes to negative) Now the equation is -4u+6= 24 Take 6 of both sides -4u=24-6= 18 -4u= 18 So u= -18/4 Which simplifies to -9/2
