Question

if (r+3,2r+9) is a solution of the equation 5x-2y=10 then the value of 7r/13 is
a 7
b 12
c 35/39
d 14

Answer 1

Answer:

The answer is 7  [Option "a"]

Step-by-step explanation:

Since (r+3, 2r+9) is a solution of 5x - 2y = 10, we have:

5(r+3) - 2(2r+9) = 10      {A solution should satisfy an equation]

5r + 15 - 4r - 18 = 10

r - 3 = 10

r = 13

Hence, 7r/13 = 7*13/13 = 7

Answer 2

Answer:

a. 7

Step-by-step explanation:

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