Răspuns :
a+b=540
a-25/100a+b-20/100b=416
a-a/4+b-b/4=416
20a-5a+20b-4b/20=416
15a+16b/20=416
15a+16b=416*20
15a+16b=8320
a+b=540⇔a=540-b
15(540-b)+16b=8320
8100-15b+16b=8320
b=8320-8100
b=220
a+b=540
a+220=540
a=540-220
a=320
a-25/100a+b-20/100b=416
a-a/4+b-b/4=416
20a-5a+20b-4b/20=416
15a+16b/20=416
15a+16b=416*20
15a+16b=8320
a+b=540⇔a=540-b
15(540-b)+16b=8320
8100-15b+16b=8320
b=8320-8100
b=220
a+b=540
a+220=540
a=540-220
a=320