If a straight line passes through point a (- 3,4), and the sum of intercept on two axes is 12, then the linear equation is______ .

If a straight line passes through point a (- 3,4), and the sum of intercept on two axes is 12, then the linear equation is______ .

Let the cross section be a, then the longitudinal intercept be 12-A, and the linear equation be XA + Y12 − a = 1. Substituting a (- 3, 4), we can get − 3A + 412 − a = 1. When a = - 4, a = 9, the linear equation is x9 + Y3 = 1. When a = - 4, we can get x + 3y-9 = 0. When a = - 4, we can get x − 4 + Y16 = 1, we can get y = 4x + 16