Răspuns:
a+b=48
a+(b+12)=a+b+12=48+12=60
(a+7)+(b+5)=a+7+b+5=a+b+12=48+12=60
Răspuns:
Explicație pas cu pas:
[tex]\bf a+b=48[/tex]
[tex]\bf a+(b+12)=??[/tex]
[tex]\bf (a+7)+(b+5)=??[/tex]
[tex]\purple{a+(b+12)}=a+b+12 = 48+12 = \purple{\underline{~60~}}[/tex]
[tex]\red{(a+7)+(b+5)}=a+7+b+5=a+b+12=48+12=\red{\underline{~60~}}[/tex]