(1 3/4+х):3,6 = 1 1/2 7/4 + x = 3/2 * 10/36⇒ 7/4 + x = 5/12 ⇒
x =5/12 - 7/4⇒ x = -16/12 x= - 4/3 x = - 1 1/3