Say there is a decrease in the price of one of the inputs needed to produce good Y. As a result, the equilibrium price of X(a substitute) will:

The equilibrium price of substitute good X will reduce

Explanation:

Substitute goods are goods that satisfy the same basic kind of demands, and in terms of production, substitute goods are goods that require the same raw materials for production, as a result, one of the goods can be used in place of the other. If there is a decrease in the price of one of the inputs needed to produce good Y, this will eventually result in the selling price of good Y, hence an increase in demand for Y and a reduction in the demand for good X, as a result, the equilibrium  price of X will reduce to maintain the demand.

i might look it up later.

answer; /// the above statement is (false);