Is this correct? (Click on picture to see it fully.)
Thanks.

h = (3 - x)/2

Your answer is not correct.

Step-by-step explanation:

⅓(x + 2h) + 1 = 2

Subtract 1 from both sides;

⅓(x + 2h) + 1 - 1 = 2 - 1

This gives;

⅓(x + 2h) = 1

Multiply both sides by 3;

⅓(x + 2h) × 3 = 1 × 3

This gives;

x + 2h = 3

Subtract x from both sides to get;

2h = 3 - x

Divide both sides by 2 to get;

h = (3 - x)/2