2/3 h - 1/3 h + 11 = 8
You could begin by combining like terms on the left side.
Notice that you have (2 of something) minus (1 of the same thing).
The things are (1/3 of 'h'). When you subtract the 1 from the 2,
what you have left there is 1/3h .
So now the equation is 1/3 h + 11 = 8
Subtract 11 from each side : 1/3 h = -3
Multiply each side by 3 : h = -9
