Five times the number of test tubes in a school’s chemistry lab exceeds three times the number of beakers it has by 660. The sum
of two times the number of test tubes and five times the number of beakers is 450. The number of beakers in the school’s lab is? and the number of test tubes in the school’s lab is?
4x-30=180 your missing the 180 part because it’s a straight line. so do 4x-30=180. subtract 30 from 180, then when you get that answer divide it by four