Немогу помочь брату, подскажите?
1)(39+х)-84=78
2)(х-83)+316=425
3)(600-х)-92=126
х+27-14=36

(39+х)-84=7839+х=78+8439+х=162х=162-39х=123(х-83)+316=425х-83=425-316х-83=109х=109+83х=192(600-х)-92=126600-х=126+92600-х=218х=600-218х=382х+27-14=36х+27=36+14х+27=50х=50-27х=23

1)(39+х)-84=78

39+x-84=78

x=78-39+84=123

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2)(х-83)+316=425

x-83+316 = 425

x=425+83-316 =192

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3)(600-х)-92=126

600-x - 92 = 126

-x = 126-600+92 =

-x = -382

x=382

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х+27-14=36

x=36-27+14 = 23