Question

решите уравнения (х-5,4)+2,3=5,2
и (9,1-х )-2,8=2,9

Answer 1

$(x-5.4)+2.3=5.2 \ x-5.4=5.2-2.3 \ x-5.4=2.9\x=2.9+5.4\x=8.3 \ \ (9.1-x)-2.8=2.9 \ 9.1-x=2.9+2.8 \ 9.1-x=5.7 \ x=9.1-5.7 \ x=3.4$