Question

Find the value of x. Only need 7 and 9 answered.

Answer 1

Explanation

7.

`(6)/(6+6) =(8)/(8+8) =(7)/(x) \\(1)/(2) =(7)/(x) \\x=7*2=14`

9.

`(x+1)/(12) =(x-1)/(8) \\12x-12=8x+8\\12x-8x=8+12\\4x=20\\x=20/4=5`