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Afla numarul a 13-4×3:[2×11-5×(10×2-2×2×a)]+2×3=13

Răspuns :

Răspuns:

a=4

Explicație pas cu pas:

13-12:[22-5×(20-4a)]+6=13

13-12:(22-100+20a)+6=13

-12:(-78+20a)+6=0

-12/-78+20a +6=0

-12/2(-39+10a) + 6=0

-6/-39+10a +6=0

-6/-39+10a=-6 |×(-39+10a)

6=(-39+10a)×6

1=-39+10a

-10a=-39-1

-10a=-40 |×(-1)

10a=40

a=4

Sper ca te-am ajutat :)

13-4x3:[2x11-5x(20-2x2a)]+2x3=13
13-4x3:(2x11-5x19-4a)+6=13
13-4x3:(2x6x19-4a)=13-6
13-4x3:12x19-4a=7
13-12:12x19-4a=7
13-1x19-4a=7
19-13-4a=7
6-4a=7
4a=7-6
4a=1
a=4:1
a=4