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86x24-a=1379 b+37x62=3200 c-85x19=987

Răspuns :

86x24-a=1379
2064-a=1379
-a=1379-2064
-a=-685(-1)
a=685
b+37x62=3200
b+2294=3200
b=3200-2294
b=906
c-85x19=987
c-1615=987
c=987+1615
c=2602
a)
86x24-a=1379
2064-a=1379
2064-1379
685=a
a=685
b)
b+37x62=3200
b+2294=3200
b=3200-2294
b=906
c)
c-85x19=987
c-1615=987
c=987+1615
c=2602