Question 296022
*[invoke linear_equation "x", 2, 1, 5 ]*[invoke explain_simplification "x+x-x+2x=6" ]*[invoke substitution "x^2-2x", "x", 3 ]*[invoke describe_linear_equation 4, 2, 8 ]*[invoke linear "x", "y", 1, 1, 2, 1, -1, 0 ]*[invoke quadratic "x", 1, -2, -3 ]*[invoke linear_substitution "x", "y", 1, 1, 2, 1, -1, 0 ]