x = the first of the three consecutive numbers
x + 1 = the second of the three consecutive numbers
x + 2 = the third of the three consecutive numbers
Write the equation:
x + (x + 1) + (x +2) = 141
Combine like terms:
3x + (1+2) = 141
To solve for x, subtract 3 from both sides:
3x + 3 - 3 = 141 - 3
To solve for x, divide 3 from both sides:
3x/3 = 138/3
x = 46
Check:
46 + 47 + 48 = 141