It is known that:the pair of variables x=5, y=7 is the solution to the equation ax-2y=1. Find the coefficient a.

a = 3

Step-by-step explanation:

Fill in the given values:

a*5-2*7 = 1 = >

5a = 1 + 14

a = 15/5 = 3

a=3

Step-by-step explanation:

First, you replace the variables x and y in the equation with their respectful values, making the equation 5a-2 (7) = 1.

Then, you simplify the - 2 (7), which equals 14, making the equation 5a-14=1.

Then, you add 14 from both sides, making the equation 5a=15.

Finally, you divide both sides by 5, making the answer a=3.