Ilove the new year! this wonderful holiday i spent with your family! at first, my mother prepared salads, main dish, grilled chicken. the pope at the time went for the christmas tree market. when he brought it, he and i became her dress up. tree was very beautiful, her hung colored balls. then, my parents went to the party, which was held in the square of our cities.there i took a picture with santa claus. it was so much fun! in the morning i found under the tree a wonderful gift. i brought a night of santa claus. i was happy!
12,5*х=12,5х -пробежал первый 12,5х/940 -скорость первого на всей дистанции 100:12,5х/940=100*940/(12,5х)=8*940/х=7520/х- время первого на стометровке
12х-100-пробежал второй (12х-100)/940-скорость второго на всей дистанции 100:(12х-100)/940=100*940 /(12х-100)=94000/(12х-100)-время второго на стометровке
(3724+х):54=69 надо : х=( 69*54)-3724
69*54=3726, 3726-2724=2 всё х найден я в 7 классе всё точно на 100%