+68
A builder has some red and grey bricks. The red bricks weigh 6 kilograms each, and the grey bricks weigh 7 kilograms each. If the total weight of all 7 bricks is 46 kilograms, how many of each type of brick does Cooper have?
A builder has some red and grey bricks. The red bricks weigh 6 kilograms each, and the grey bricks weigh 7 kilograms each. If the total weight of all 7 bricks is 46 kilograms, how many of each type of brick does Cooper have?
6*6 + 7 = 43
6*5 + 2*7 = 44
6*5 + 3*7 = 45
6*3 + 4*7 = 46 
