7 (4-3x)-(8,5-x)=4-3 (x-8)
7 (4-3х)-(8,5-х)=4-3 (х-8) 28-21х-8,5+х=4-3х-24 3х-21х+х=-28+4+8,5-24 -17х=-39,5 х=2,3235294118