<span>19+52−0−(1)(5)</span>
<span><span><span>71−0</span>−<span><span>(1)</span><span>(5)
</span></span></span></span><span><span>71−<span><span>(1)</span><span>(5)
</span></span></span></span><span><span>71−5
</span></span><span><span>Answer:
66</span></span>
For this case we must find the solution of the following system of equations:

If we multiply the first equation by -2 we have the following equivalent system:

If we add the equations we have:

Thus, the system has infinite solutions.
Answer:
Infinite solutions
The answer is 10, this is because 7 1/2 = 7.5 3/4=.75 and if there is 7.5 inches of ribbon, but cut into .75 pieces you would divide 7.5 by .75 which equals 10.
Hi do u still need the answer