Bob has some 10 pound weights and some 3 pound weights together all his ways add up to 50 pounds if x represents the number 3 pound weights and y represents the number 10 pound weight which equation can be used to find the number of each type of weight bob has

No. of 3 pound weights = (10X + 10Y - 50) / 7

No. of 10 pound weights = (X + Y) - [ (10X + 10Y - 50) / 7 ]

Step-by-step explanation:

Assuming all are 10 pound weights

Total mass of weights = 10 (X + Y) = 10X + 10Y

Difference in assumed mass and actual mass = 10X + 10Y - 50

Difference in mass of each type of weight = 10 - 3 = 7

No. of 3 pound weights = (10X + 10Y - 50) / 7

No. of 10 pound weights = (X + Y) - [ (10X + 10Y - 50) / 7 ]

the answer would be 1 1/72

step-by-step explanation:

you can rewrite the equation by separating the parts and then solving individually:

10-9=1

1/8 - 1/9=

find l c d and then combine:

1 1/72