More Help and Stuff

We have  that

4(9) + b =  7b + 0       simplify

36 + b  =  7b       subtract b from both sides

36  =  6b      divide both sidesby 6

6  = b

4((9)  + 6    =   7(6)  +  0

36 + 6  =   42

So.....n  = 42

If the triangle is x, then 4x base nine is equal to 36+x base 10 and x0 base 7 is equal to 7x base 10. Since they are equal that means tha36+x=7x, solving for x, we get x= 6. If the triangle is 6, we get 46 base 9 equals 60 base severn which equals 42 base 10 which is your answer.

Hope it helps!

42 was right. Thanks for answering! I really appreciate it :D