So let's do that. Let's subtract the left-hand side of this equation from that. So, or essentially, we could add these two, so we can multiply this one times a negative one, and then add these two equations. The A's are going to cancel out, and we are going to be left with six B minus B is five B, is equal to 375, is equal to 375. Did I do that right? If I add 125 to this, I get to 500, and then another 25, I get to 525. So five B is equal to 375, or if we divide both sides by five, we get B is equal to, B is equal to 75.