gosh, please guys, i need help here, I just cannot at all comprehend these sums...please help..
32 tables are stacked in a room, some are 3-legged and some are 4-legged. If there are 115 legs, how many tables are there in the room of each type?
How many tables are there in the room of each type?
Let the 3-legged tables = T
Then the 4-legged tables =32 - T
3T + 4(32 - T) =115
3T + 128 - 4T =115
-T =115 - 128
-T =- 13 multiply both sides by -1
T = 13 - 3-legged tables
32 - 13 = 19 - 4-legged tables.