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Crinumarin1
a fost răspuns

calculeaza 3x+7x-8x,stiind ca:

a)x=12    b)x=5  c)x=100

Răspuns :

Danailagabriela
3x+7x-8x=10x-8x=2x
a)x=12
2x=2x12=24
b)x=5
2x=2x5=10
c)x=100
2x=2x100=200
Mirta
3x+7x-8x
x=12
3 x 12+7 x 12-8x12
36+84-96
120-96
24 

x=5
3x5+7x5-8x5
15+35-40
50-40
10

3x100+7x100-8x100
300+700-800
200