Question

vă rog ..ajutati mă ....măcar cateva ​

Answer 1

Răspuns:

Explicație pas cu pas:

27)

521=10*1-0+n

521=10-0+n

521=10+n

n=521-10

n=511

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28)

4+[ 4-(4+4:4*4-4)+a] :4= 8

[4-(4+1*4-4)+a]:4=8-4

[4-(4+4-4)+a] :4=4

(4-4)+a=4*4

4-4+a=16

0+a= 16

a= 16

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29)

b:6*6:3*3=16+1+13

b:6*2*3=30

b:6*2=30:3

b:6*2=10

b:6 =10:2

b:6=5

b=6*5

b=30

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30)

113+904=2.000-y+y:y

y:y=0

1017 = 2.000-y+0

1017=2.000-y

y=2000-1017

y=983

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31)

(h:5-5)*9+31=40

(h:5-5)*9=40-31

(h:5-5)*9=9

(h:5-5)=9:9

(h:5-5)=1

h:5=1+5

h:5=6

h=5*6

h=30

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32)

8+6*[4+27:(0+u*9)]=49+1

8+6*[4+27:(0+u*9)]=50

6*[4+27:(0+u*9)]=50-8

6*[4+27:(0+u*9)]=42

4+27:(0+u*9)=42:6

4+27:(0+u*9)=7

27:(0+u*9)=7-4

27:(0+u*9)=3

0+u*9=27:3

0+u*9=9

u*9=9-0

u*9=9

u=9:9

u=1

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33)

[12-3+(3:3)] *z+1=41

(12-3+1)*z+1=41

12z-3z+z+1=41

10z=41-1

10z= 40

z=40:10

z=4