You can put this solution on YOUR website! 6B+4=2(2B+1)
Whatever you add, subtract multiply or divide on one side you have to do to the other side.
but first let's multiply out 2(2B+1)
2(2B+1)=4B+2 because we multiply 2*2B and 2*1
6B+4=2(2B+1)
6B+4=4B+2
now subtract 4B from both sides
2B+4=2
now subtract 4 from both sides
2B=2-4
2B=-2
divide both sides by 2
B=-1