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AlinaMihesan
a fost răspuns

aflati termenul necunoscut 278 x3 - a =470 195 x 8 plus b = 2 450 c-306 x 7 = 420 d plus 315 x 8 = 12.300

Răspuns :

Coco81
278x3-a=470
834-a=470
a=834-470
a=364
834-364=470

195x8+b=2450
1560+b=2450
b=2450-1560
b=890
1560+890=2450

c-306x7=420
c-2142=420
c=2142+420
c=2562
2562-2142=420

d+315x8=12300
d+2520=12300
d=12300-2520
d=9780
9780+2520=12300
Eee2e
278x3-a=470
834-a=470

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