1)4527*50=226350
2)710037:9=78893
3)226350-78893=147457
======================
1)932+17692=18624
2)4*18624=74496
3)74496:6=12416
(7*z-93):48:8=24:12
(7z-93):48:8=2
(7z-93):6=2
7z-93=2*6
7z-93=12
7z=12+93
7z=105
z=105:7
z=15