Question

What is X?*
7x - 4
5х + 12
8
10
52
64

Answer 1

Answer:

x = 8

Step-by-step 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

$x = 8$

Answer 2

Answer:

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...