Express in terms of [X*1]

1 + 2k3 [X1] = k1[A] – k4[X]2 + k2[X1][A] 1+ kz + k5[Xi] [X1] = k1[A] – k4[X1]+ k2[X*][A]{1 + 2k3(1 + k3 +k5[Xi])-1} [X1] = k1[A] – k4[X1]+ k2[X*][A]{1 + 2k3(1 + k3 +k5[Xi])-1}