Answer:
6
Step-by-step explanation:
Because 90 lawns in 45 hours 45 is half of 90 and 6 is half of 12
Brainliest please
[tex]\frac{90}{45}[/tex] = [tex]\frac{12}{x}[/tex]
90x = 12 × 45
2x = 12
x = 6
