Решить уравнения. уравнение: а)6*(2х-3)+2(4-3х)=5. б)4: у=5целых одна третих: одну целую одну вторую.

а) 12х - 18 + 8 - 6х = 5                         б) 4 : у = 5 1/3 : 1 1/2             

    12х - 6х = 5 + 18 - 8                             5 1/3у = 4 * 1 1/2         (по св-ву пропорции)

    6х = 15                                                 16/3у = 4 * 3/2

    х = 15 : 6                                              16/3у = 12/2 = 6

    х = 2,5                                                  у = 6 : 16/3 = 6 * 3/16

                                                                  у = 18/16  = 1 2/16

                                                                  у = 1 1/8 = 1,125