proszę bardzo o pomoc zad.1

60%•16=9.6 85%•36= 68%•8= 100%•63/210%=30 100%•53, 2/140%=38 100%•23,2/0,4%=5800 (;

40%-16 100%-x 40x=1600:40 x=40 15%-36 100%-x 15x=3600:15 x=240 32%-8 100%-x 32x=800:32 x=25 210-63 100-x 210x=6300 x=30 140-53,2 100-x 5320=140x x=38 0,4-23,2 100-x 0,4x=2320:0,4 x=5800