Question

X = a) 20 b) 40 c) 80

Answer 1

$x = \frac{1}{2} (x + 60 - 20)$

$x = \frac{1}{2} (x + 40)$

$x = \frac{1}{2}x + 20$

$x - \frac{1}{2}x = 20$

$\frac{1}{2}x = 20$

$x = 20 \times 2$

$x = 40$

Answer 2

The answer is b) 40

Have a great day!

-Fishtank