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DeniStefania1
a fost răspuns

1.Aflati termenul necunoscut:
1)3×(x+1)+4=x+11
2)[(3x-2)×5-1]:2+5=7

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Răspuns :

Alina10
1)3x+3+4=x+11
3x-x=11-3-4
2x=4
x=4/2
x=2
2)(15x-10-1):2+5=7
(15x-11):2+5=7
7.5x-5.5+5=7
7.5x-0.5=7
7.5x=7.5
x=7.5/7.5
x=1

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