Question

Aflati.l pe c din ecuatia 1+[2×(1+c)-59]×9=10

Answer 1

Răspuns:

1+[2×(1+c)-59]×9=10

[2×(1+c)-59]×9=10-1

[2×(1+c)-59]×9=9

2×(1+c)-59=9:9

2×(1+c)-59=1

2×(1+c)=59+1

2×(1+c)=60

1+c=60:2

1+c=30

C=30-1

C=29

Answer 2

Răspuns:c egal cu 29

Explicație pas cu pas:

1+(2(1+c)-59)*9=10

(2(1+c)-59)*9=9

2(1+c)-59=1

2(1+c)=60

1+c=30

c=30-1=29