Answer:
Step-by-step explanation:
Total weight of the barricade is 310 kg using 8 boxes of books
Each box of books weighs 30 kg
We need to determinethe weight of the table in order write the proper equation
Total wieght of the barricade = Table Weight + Book Weight
solving for Table Weight substract Book Weight from both sides
Total wieght of the barricade - Book Weight = Table Weight
310 - 8(30) = Table Weight
310 - 240 = Table Weight
70 = Table Weight
Total wieght of the barricade = Table Weight + Book Weight
W = 70 + 30x where x is the number of boxes
