You can put this solution on YOUR website! -3.8q+1.8 [solve for the q-term]
-3.8q+1.8=0 [set the expression equal to zero]
-3.8q+1.8-1.8=0-1.8
-3.8q=-1.8
-3.8q/-3.8=-1.8/-3.8
q=.4737
.
check by plugging (q=.4737) back into the original equation:
-3.8(.4737)+1.8=0
-1.8+1.8=0
0=0 [checks out]