119+a*(35:5)-(273+15)=83
119+a*7-288=83
a*7=83+288-119
a*7=252
a=252:7
a=36
2, 5 млн = 2 500 000; 34, 5 тыс = 34 500
У- 35-43-67=у-(35+43+67)=у-145
614-(z+36)= (614-36)+z=578+z
1ый, 3ий, 6ой-одинаковые.
<span>102-(155.4 :14.8+2.1)*3.5 =57.9</span>
<span>1)155.4:14.8=10.5</span>
<span>2)10.5+2.112.6</span>
<span>3)12.6*3.5=44.1</span>
<span>4)102-44.1=57.9</span>