4-7 x/15+1-x/3=4-2x+1/5

(4-7 х) / 15 + (1-х) / 3=4 - (2 х+1) / 5. (•15)

15• (4-7 х) / 15 + (1-х) •15/3=4•15 - (2 х+1) •15/5

4-7 х+5 (1-х) = 60-3 (2 х+1)

4-7 х+5-5 х=60-6 х-3

-7 х-5 х+6 х=60-3-4-5

-6 х=48

Х=48: (-6)

х=-8

Думаю так