Răspuns:
mama 32 ani
tata 35 ani
Explicație pas cu pas:
anii tatalui .....x
anii mamei.....y
[tex]\left \{ {{x-3=y} \atop {2(x+y)=134} \right.[/tex] ⇔[tex]\left \{ {{x=y+3} \atop {2(y+3+y)=134}} \right.[/tex][tex]\left \{ {{x=y+3} \atop {2(2y+3)=134}} \right.[/tex]⇔[tex]\left \{ {{x=y+3} \atop {4y+6=134}} \right.[/tex]⇔[tex]\left \{ {{x=y+3} \atop {4y=134-6}} \right.[/tex]⇔[tex]\left \{ {{x=y+3} \atop {4y=128}} \right.[/tex]⇔[tex]\left \{ {{x=y+3} \atop {y=\frac{128}{4} }} \right.[/tex]⇔[tex]\left \{ {{y=32} \atop {x=32+3}} \right.[/tex]⇔[tex]\left \{ {{y=32} \atop {x=35}} \right.[/tex]
sper ca team ajutat :)
