Transform the following differential equation into an equivalent system of first-order differential equations. Use the variables x1: x, x2 = x',etc. (so that your equations will have the form x'1 = x2. etc.: denote subscripts by appending the subscript to the variable name: x1 = x1). Equation to rewrite: taxo) _ 30sz +14tx' + 15x = 6111(31) x1'= x2'= X3I =