you would just add both of them together so the weight would be 7.69 Ibs
There has to be more to this question then i can help you
By looking at the statement I derived,
32 = 8 * 4
21/25, 4.37, 5, 5.844, 117/20
19x - 11 = 10x + 7
9x = 18
x = 2
19x - 11 = 19(2) - 11 = 27
3y + 27 = 180
3y = 153
y = 51
answer
x = 2 and y = 51