54÷(5+ m )+(3×3+4×4)÷5=9×3-12÷2-(5×9-7×5)

54:(5+m)+(3·3+4·4):5=9·3-12:2-(5·9-7·5)54:(5+m)+(9+16):5=27-6-(45-35)54:(5+ m)+25:5=27-6-1054:(5+ m)+5=1154:(5+ m)=11-554:(5+ m)=65+m=54:65+m=9m=9-5m=454:(5+4)+(3·3+4·4):5=9·3-12:2-(5·9-7·5)54:9+(9+16):5=27-6-(45-35)6+25:5=21-106+5=11