ASK YOUR TEAC Use technology to solve the system of equations, if a solution exists. (If there are infinitely many solutions, express your answers in terms of X4 as in Example 3. there is no solution, enter NO SOLUTION.) x+3x2 + 2x3 + 2x4 = x1 2x1 x2 + 3x3 3 x + x2 + = 1 + 2x3 - 3x4 = -1 X1 - 3x2 = 1 (X1, X2, X3, X4)