Question

Resolva: 2x + 50 - 10 = x + 100
?

Answer 1

2x+50-10=x+100
2x-x=100-50+10
x= 60

Answer 2

$2x+50-10=x+100\\ Isola\ o\ x\\ 2x-x=-50+10+100\\ Resolve\ a\ conta: \\x=60$