X-2/5=3/7-8/35. S.O.S

Question

X-2/5=3/7-8/35. S.O.S

Answer 1

X-2/5=3/7-8/35
x-2/5=15/35-8/35
x-2/5=7/35
x=7/35+2/5
x=7/35+14/35
x=21/35
Ответ: x=21/35

Answer 2

X-2/5=3/7-8/35⇒=3/7-8/35+2/5=(15-8+14)/35=21/35=0,6

Ответ: 0,6