Answer:
5x
Step-by-step explanation:
6x - ? = x
? = 6x - x
? = 5x
Hope it helps ⚜
[tex]6x - ? = x\\-?=x - 6x\\-?=-5x\\\Longrightarrow \: \: ?=5x[/tex]
[tex]\heartsuit \: \sf\: Jenkai \: \bigstar[/tex]
