Answer:
40, 41, 42
Step-by-step explanation:
x +x+1+x+2=123
3x+3=123
3x=123-3
3x=120
x=120:3
x=40(the first number
40+1=41 (the second number
40+2=42 (the third number
[2+(6times8)]-1
= [2+(6 * 8)] -1
= [2+(48)] -1
= 50 -1
= 49
x = -25
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