He has 3/5 of his cards left because he had 62/105 of his cards and that simplified is 3/5
The solution to the systems of equations is (7, 3)
Given the systems of equations expressed as:
-x + 4y = 5 ....................1
x - 5y = -2 ...................... 2
Add both equations to have:
-x+x + 4y - 5y = 5 - 2
4y-5y = -3
-y = -3
y = 3
Substitute y = 3 into equation 1:
-x + 4(3) = 5
-x + 12 = 5
-x = 5 - 12
-x = -7
x = 7
Hence the solution to the systems of equations is (7, 3)
Learn more on simultaneous equations here: brainly.com/question/148035
Answer
Solution
Simplify both sides of the equation.
We are left with d = 4+
Add
Hence, d = 
It is 20 because if u divide 78 by 3.75 ( 3 3/4 ) than equals 20.8
