Question

What is X?*
7x - 4
5х + 12
8
10
52
64

Answer 1

7x - 4......1

5х + 12......2

on multiplying by 3 in eq 1

= 21x-12...3

on substracting eq 2 from 3

21x-12=0

-5x+12=0

=16x=0

x=1/16

sorry but I can't find your answer

but I tried...

Answer 2

x = 8

Explanation:

You know that 7x - 4 and 5x + 12 are equal, so you can set up an equation and solve it:

`7x - 5 = 5x + 12`

subtract 5x from both sides

`2x-4=12`

Add 4 to both sides

`2x = 16`

divide both sides by 2

`x = 8`