Решите уравнения 14х-9х=125 б)15у+25у=120 в) 13х+5х=108:2 г)29-17у=12×4

14х-9х=125...............15у+25у=120 5х=125.......................40у=120 х=125÷5......................у=120÷40 х=25.............................у=3 __________.............._________ 14×25-9×25=125........15×3+25×3=120 125=125........................120=120 13х+5х=108.............29-17у=12×4 18х=108....................-17у=48-29 х=108÷18..................у=19÷(-17) х=6............................у= -19/17 ___________.......____________ 13×6+5×6=108.......29-17×(-19/17)=12×4 108=108.........................48=48