21/b = 147/105
Cross multiply and solve for b.
Is the answer 15. I am trying to help my grand daughter with her homework,
Yes. You're right. :-)
To find the value of b in the equation 21/b = 147/105, we can set up a proportion and solve for b.
We start by cross-multiplying:
21 * 105 = 147 * b
Simplifying:
2205 = 147b
Now, we need to isolate b by dividing both sides of the equation by 147:
2205 / 147 = b
Simplifying:
15 = b
Therefore, the value of b in the equation 21/b = 147/105 is 15.