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Nedeamariana63
a fost răspuns

1/ 3×(420-6×e):64=6
2/ a+174+[(49:7+210:70):2] +170:10=210
3/ [21-(324:12+v):7] ×3+55=100​

Răspuns :

Saragabriela833

Explicație pas cu pas:

3× ( 420 -6 ×e ) ÷64=6

(420- 6 ×e ) ÷64=6÷3

(420-6×e )÷64=2

420-6 × e=2×64

420-6×e=128

6×e =420-128

6×e = 292

e= 292÷6

e= 48,6

[21- ( 324÷12+v ) ÷7]×3+55=100

[21-(27+v )÷7]×3=100-55

[21-(27+v)÷7]×3=45

21-(27+v )÷7=46÷3

21-(27+V )÷7=15

(27+v)÷7=21-15

(27+v)÷7=6

27+v=6×7

27+v= 42

v= 42-27

v= 15

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