The standard form of a linear equation is: color(red)(A)x + color(blue)(B)y = color(green)(C)
Where, if at all possible, color(red)(A), color(blue)(B), and color(green)(C)are integers, and A is non-negative, and, A, B, and C have no common factors other than 1
First, add color(red)(9) to each side of the equation to move the constant to the right side of the equation as required by the formula while keeping the equation balanced:
color(red)(9) - 9 + 8x = color(red)(9) + 10y
0 + 8x = 9 + 10y
8x = 9 + 10y
Now, subtract color(red)(10y) from each side of the equation to put the equation in Standard Linear form while keeping the equation balanced:
8x - color(red)(10y) = 9 + 10y - color(red)(10y)
8x - 10y = 9 + 0
color(red)(8)x - color(blue)(10)y = color(green)(9)