а)66х+34х=100х=100*95=9500
66х+34х=100х=100*603=60300
б)91m-61m=30m=30*68=2040
91m-61m=30m=30*506=15180
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a)43x+19x=12710
62x=12710
x=205
б)60у-3у=15390
57у=15390
у=270
в)7m+m-12=28
8m-12=28
8m=28+12
8m=40
m=5
г)16t-t+5=50
15t+5=50
15t=50-5
15t=45
t=3