`x + x : 0,5 + x :0,25+ x :0,125 = 50 - x × 35`
`=> x + x × 2 + x ×4 + x ×8 = 50 - x × 35`
`=> x × (1+2+4+8) = 50 - x × 35`
`=> x × 15 = 50 - x ×35`
`=> x ×35 +x × 15 = 50`
`=> x × (35 + 15) = 50`
`=> x × 50 = 50`
`=> x = 50:50`
`=> x = 1`
(Chúc bạn học tốt)