Question

What is the missing x-value if (x,1) is a solution of 2x-y=5?

Answer 1

Equation of 2x-y= 5 where we know the y value from (x,1)

We substitute the y value in the equation to get the x value easily

2x-1= 5
2x = 5 + 1
2x = 6
x = 3 (divide both side by 2)

Answer x = 3 when y = 1