Question

Revolvă prin metoda mersului invers:

x+3300-4260=2040

x+170+1700=7000

x+6543+3456=20001

x-250-16000=13750

Answer 1

Răspuns:

x+3300-4260=2040

x+3300=2040+4260

x+3300=6300

x=6300-3300

x=3000

x+170+1700=7000

x+170=7000-1700

x+170=5300

x=5300-170

x=5130

x+6543+3456=20001

x+6543=20001-3456

x+6543=16545

x=16545-6543

x=10002

x-250-16000=13750

x-250=13750+16000

x-250=29750

x=29750+250

x=30000

Answer 2

x+3300=4260+2040=6300
x=6300-3300=3000

x+170=7000-1700=5300
x=5300-170=5130

x+6543=20001-3456=6543
x=6543-6543=0

x-250=13750+16000=29750
x=29750+250=30010