The sequence is poorly defined.
1+3+5 appears to be a sequence of odd numbers. However, that cannot end in 100: it can attain the values of 99 or 101. Obviously the answer will depend on which one of these is the final number.
An alternative is that the sequence is not that of odd numbers but some other sequence: for example,
t(n) = (29n3 - 174n2 + 399n - 214)/40 which, for n = 1, 2, 3, generates the sequence 1, 3, 5, 11.35, 26.4, 54.5, 100 whose sum is 201
2
x=-2
x = 3 and 1/3
x+1=x+2 x=1+2+x 0x=1+2 0x=3 0x=/=3 (=/= means does not equal) so there is no solution
a= 2, b = 3 (or vice-versa)
If you mean: y = x^2+4x+3 and y = 2x+6 Then the solution is: x = 1 or x = -3
Do you mean: 1/4+x-1/3 = 2/3+3+1/4 If so then: x = 4
X= -1 1*2 0-1 -1-2 -3/3 -1
6x = 1 x = 1/6
YES ! When x = -1 then y = 3(-1) + 2 = -3 + 2 = -1
It is (-1, 3).
Solution: x = 1/4 and x = -3.