Luca is 3.2 kg heavier than Eva. Wyndi is 1.05 kg heavier than Luca.<br><br>
[[model:questions/solutions/q4643.png]]<br><br>
&bull; Let Eva's mass = 1 unit<br>
&bull; Luca's mass = 1 unit + 3.2 kg<br>
&bull; Wyndi's mass = 1 unit + 3.2 + 1.05 = 1 unit + 4.25 kg<br>
&bull; Total = 3 units + 3.2 + 4.25 = 3 units + 7.45 = 104.95 kg<br>
&bull; 3 units = 104.95 − 7.45 = 97.5 kg<br>
&bull; 1 unit = 97.5 ÷ 3 = 32.5 kg (Eva)<br>
&bull; Luca = 32.5 + 3.2 = 35.7 kg<br><br>
Luca's mass is 35.7 kg.<br>
Check: Eva 32.5 + Luca 35.7 + Wyndi 36.75 = 104.95. ✓