Using the addition/subtraction method, find the value of x and y to satisfy the following equations: 5x - 5y = 8; 7x - 5y = 20
a. x = -6 y = -4.4
b. x = 6 y = 4
c. x = 4.4 y = 6
d. x = 6.4 y = 4
e. x = 6 y = 4.4
e. x = 6 y = 4.4
Mathematics
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