10+3(x+2)=31 simplify
10 + 3x + 6 = 31 combine like terms
16 + 3x = 31 subtract 16 from both sides
3x = 15 divide both sides by 3
x = 5
Let's use order of operations with CPhill's x=5
5+2=7
10+3*7
3*7=21
10+21=31
So CPhill=correct
And x=5