решение уравнения х*15,2=9,12; 19,83+х=138,16; х-54,81=19,98; х:7,8=15,2.

х×15.2=9.12 х=9.12:15.2 х=0.60.6×15.2=9.1219.83+х=138.16х=138.16-19.83х=118.3319.83+118.33=138.16х-54.81=19.98х=19.98+54.81х=74.7974.79-54.81=19.98х÷7.8=15.2х= 15.2×7.8х=118.56118.56÷7.8=15.2