Ребята помогите!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 1) Решите уравнение 4/9x+1/3x=6,3 2)Решите уравнение 1/7x+3/14x=14 3)Решите уравнение 1/6x+5/12x=8,4 4)Решите уравнение 1/3x+5/9x=7,2

1) 4/9х + 1/3х = 6,3 4/9х + 1*3/3*3х = 6,3 4/3х + 3/9х = 6,3 7/9х = 6,3 х = 6 3/10 : 7/9 х = 63/10 * 9 /7 х = 63*9 / 10*7 х = 567/70 х = 8,1 2) 1/7х + 3/14х = 14 1*2/7*2х + 3/14х = 14 2/14х + 3/14х = 14 5/14х = 196/14 х = 196/14 : 5/14 х = 196/14 * 14/5 х = 196 : 5 х = 39,2 3) 1/3х + 5/9х = 7,2 1*3/3*3х + 5/9х = 7 2/10 3/9х + 5/9х = 72/10 8/9х = 72/10 х = 72/10 : 8/9 х = 72/10 * 9/8 х = 648/80 х = 8,1