Kunci Jawaban Matematika kelas 8 SMP Halaman 254 Nomer 6-10 Ayo Kita Berlatih 9.3, Beserta Penjelasannya

Berat Andi = mA

Berat Budi = mB

Berat Charli = mC

Berat Dedi = mD

mA + mB /2 = 55 mA + mB = 110 kg

mB + mC/2 = 70 mB + mC = 140 kg

mC + mD/2 = 75 Mc + mD = 150 kg

mA + mD/2 = mA + mB – (mB+ mC) + mC + mD/2

= 110 – 140 + 150 / 2

= 60 kg