Question

Solve for x please describe the steps 50 points

Answer 1

x = 6

Step-by-step explanation:

USE:
`\boxed{(side-length )/(base -length) = (side-length)/(base -length) }`

solve:

`(21)/(15) = (7)/(x-1)`

`21(x-1) = 7(15)`

`21x-21 = 105`

`21x = 105+21`

`21x = 126`

`x = (126)/(21)`

`x = 6`