Răspuns:
10+10x(a-10)=200
10x(a-10)=190
a-10=19
a=19+10=29
Sper ca am ajutat!
Răspuns: [tex]\bf \red{\underline{~ a = 29~}}[/tex]
Explicație pas cu pas:
[tex]\bf [10 + 10 \cdot (a - 10)] : 10 = 20~~~\bigg|\cdot10[/tex]
[tex]\bf 10 + 10 \cdot (a - 10)= 200[/tex]
[tex]\bf 10 \cdot (a - 10)= 200-10[/tex]
[tex]\bf 10 \cdot (a - 10)= 190~~~~~\bigg|:10[/tex]
[tex]\bf a - 10= 19[/tex]
[tex]\bf a = 19+10[/tex]
[tex]\bf \red{\underline{~ a = 29~}}[/tex]
==pav38==
