(42-149.1:14.2)*5.3+6.15 решите срочно плиз

1) (39+х)-84=78                   4)253-(x-459)=138
39+х=162                              х-459=115
х=162-39                               х=459+115
х=123                                    х=574

3)<span>)(600-x)-92=126                2)(x-83)+316=425
600-х=218                             х-83=425-316
х=600-218                             х-83=109
х=382                                    х=109+83
                                              х=192

5)502-(217-x)=421               <span>6)871-(x+157)=385</span>
217-х=502-421                     х+157=871-385
217-х=81                              х+157=486
х=217-81                              х=486-157
х=136                                   х=329
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1 дм=10 см, 1 дм 5 см = 15 см