I really need help with my homework. It's a long story. My great grandma wanted to walk alone with the dog but she almost got us stranded in Winco, blah blah blah blah blah, I have cheer pictures today, blah blah blah... basically I'm in my room crying trying to do all this homework wondering if my great grandma will return home with the dog or in a body bag so I REEEEALLY need to get this homework done in a certain (short) period of time. I don't know how to work these problems: 15x7=21xb b=___ and 5x6=5x4+5=b b=___ Please help me 

I'm sorry about your distress. I hope your great grandma returns home safely.

15x7=21xb

105 = 21b

Divide both sides by 21.

105/21 = b

5 = b

Your second equation doesn't make sense. Please proofread and repost.

5x6=5x4+5xb

This is how they printed it. I could maybe use () to help you see it better? I know that 5x6 equals 30 so now I have to figure out (5x4)+5xb will equal 30 and b is....

Ahh -- Now that you corrected it, it makes sense.

5x6=5x4+5xb

30 = 20 + 5b

I'm sorry to hear that you're feeling overwhelmed with your homework. Let's break down these math problems step by step to help you solve them.

For the first problem, 15x7=21xb, you need to find the value of "b". To do that, you can use the concept of equality. Since 15 times 7 is equal to 105, you can write the equation as 105 = 21b. Now, the goal is to isolate "b" on one side of the equation.

To do that, we can divide both sides of the equation by 21, which will give us:

105 ÷ 21 = 21b ÷ 21

Simplifying, we find that 105 ÷ 21 = 5, which gives us:

5 = b

So, according to the equation, b is equal to 5.

Now, let's move on to the second problem: 5x6=5x4+5=b. Again, we need to solve for "b".

We can start by simplifying the right side of the equation first:

5x4+5 = 20 + 5 = 25

Now we have the equation 5x6 = 25 = b. To find "b", we see that both sides are already equal to 25, so we can conclude that b is equal to 25.

To summarize the answers:
In the first problem, b = 5.
In the second problem, b = 25.

I hope this helps you with your homework! If you have any other questions or need further assistance, feel free to ask.