Question

3 X + 9 is equal 12 ​

Answer 1

Answer:

3x+9=12

3x=12-9

3x=3

x=1

Answer 2

$4x - 3 = 2x + 7$

$4x - 2x = 7 + 3$

$2x = 10$

$x = \frac{10}{2} = 5$