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Ex 16 sau/și 17 plss

Ex 16 Sauși 17 Plss class=

Răspuns :

Răspuns:

la 17:1+12=13

2+11=13

3+10=13

4+9=13

5+8=13

6+7=13 astea sunt variantele

0+13

13+0

16.

a)

x+y+z=43-11

x+y+z=12

b)

3x+4y+5z=59-27

3x+4y+5z sau 5z+3x+4y=32

c)

x-2y=52-13

x-2y=39

3(x-2y)=117

117+1=118

3x-6y+1=118

17.

13=0+13, 1+12, 2+11, 3+10, 4+9, 5+8, 6+7, 7+6, 8+5, 9+4, 10+3, 11+2, 12+1, 13+0