(640×у) ×g-27=45

To solve the equation (640×y)×g - 27 = 45, we need to isolate the variable (y) by performing the necessary operations step by step.

1. Add 27 to both sides of the equation: (640×y)×g - 27 + 27 = 45 + 27 (640×y)×g = 72

2. Divide both sides by (640×g) to solve for y: (640×y)×g / (640×g) = 72 / (640×g) y = 72 / 640

3. Simplify the expression further: y = 0.1125

Therefore, the solution to the equation (640×y)×g - 27 = 45 is y = 0.1125.