pliss no 10 mohon sama kalian

selisih perbandingan=7-6=1
selisih A dan B=15
jadi:

A=6/1 × 15
=90
B=7/1 × 15
=105
jadi A+B=90+105
=195

= (6 + 7) / (6 - 7) × 15
= 13 / -1 × 15
= -13 × 15 = -195...

semoga membantu....