Factor them
45=3*3*5
18=2*3*3
lcf=2*3*3*5=90
Answer:
4 units
Step-by-step explanation:
3-2=1 unit
7-3=4 units
1*4=4 units
Answer:
x=3
Step-by-step explanation:
4x+1 = 5x-2
Bringing all like terms together,
5x-4x = 2+1
x = 3
Answer:
7 hours
Step-by-step explanation:
120 x 7 = 840