X+1/8=3/5 x-3/7=4/21
Х+1/8=3/5 х=3/5 - 1/8 х=24/40 - 5/40 х=19/40 х-3/7=4/21 х=4/21+3/7 х=4/21+9/21 х=13/21
спасибо))
)))
X+1/8=3/5 х=3/5-1/8 Х= 24/40-5/40 Х= 19/40 x-3/7=4/21 Х= 4/21+3/7 Х=4/21+9/21 Х=13/21