def solve(eq,var=‘x‘):    eq1 = eq.replace("=","-(")+")"    c = eval(eq1,{var:1j})    return -c.real/c.imag      >>> solve(‘2*x=5‘, ‘x‘)2.5

equation = raw_input(‘enter equatino:‘)try:    n1, n2 = equation.split(‘X=‘)except ValueError:    n1, n2 = equation.split(‘x=‘)print ‘answer is x=%.2f‘ % (float(n1)/float(n2))