Question

Determinati termenul necunoscut din: a)235+157-85=375+x-207
b)1243-755=71+x-375
c)483+4375-x=270+3427-197

Answer 1

a)   235 + 157 - 85 = 375 + x - 207

375 + x - 207 = 392 - 85

375 + x = 307 + 207

375 + x = 514

x = 514 - 375

x = 139

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b)  1 243 - 755 = 71 + x - 375

71 + x - 375 = 488

71 + x = 488 + 375

71 + x =  863

x = 863 - 71

x = 792

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c)   483 + 4 375 - x = 270 + 3 427 - 197

4 858 - x = 3 697 - 197

4 858 - x = 3 500

x = 4 858 - 3 500

x = 1 358