What are the number of real solutions of the equation 2 ^ -LRB- x/2 -RRB- + -LRB- 2 ^ -LRB- 1/2 -RRB- +1 -RRB- ^ x = -LRB- 3 +2 * 2 ^ -LRB- 1/2 -RRB- -RRB- ^ -LRB- x/2 -RRB- ?
What are the number of real solutions of the equation -LRB- 9/10 -RRB- ^ x = -3 + x-x ^ 2 ?