Afla numerele necunoscute. a. 87 + y = 99 b. 186 -y = 59 c. 9 ×y=54 d. y: 6 = 7 ​

Răspuns :

A) 87+y=99<=> 99-87=y<=> y=13.
B) 186-y=59<=>186-59=y<=>128.
C) 9*y=54<=>54:9=y<=>6
D)y:6=7<=>6*7=y<=>42.
Sper ca te am ajutat.

Răspuns:

a. 87 + y = 99

y = 99 - 87

[tex]\boldsymbol{ \red{y = 12}}[/tex]

Proba: 87 + 12 = 99

b. 186 - y = 59

y = 186 - 59

[tex]\boldsymbol{ \red{y = 127}}[/tex]

Proba: 186 - 127 = 59

c. 9 × y = 54

y = 54 : 9

[tex]\boldsymbol{ \red{y = 6}}[/tex]

Proba: 9 × 6 = 54

d. y : 6 = 7

y = 7 × 6

[tex]\boldsymbol{ \red{y = 42}}[/tex]

Proba: 42 : 6 = 7