x+(x+1)+(x+2)+....+(x+25)=1235
= \(\left(x+x+...+x\right)+\left(1+2+3+...+25\right)=1235\)
= \(26x+325=1235\)
=> \(26x=1235+325=1560\)
= \(26x=1560\)
=> x = 1560 : 26 = 60
=> x = 60
x + (x+1) + (x+2) + ...+ (x+25 ) = 1235
x + x + 1 + x + 2 +...+ x + 25 = 1235
(x + x + x +...+ x) + (1 + 2 +...+ 25) = 1235
26x + 325 = 1235
26x = 1235 - 325 = 910
x=910:26=35
x + (x + 1) + (x + 2) + ..... + (x + 25) = 1235
=> x + x + 1 + x + 2 + .... + x + 25 = 1235
=> (x + x + x + ... + x) + (1 + 2 + 3 + .... + 25 ) = 1235
=> 26x + [ (25 + 1) x 25 : 2] = 1235
=> 26x + 325 = 1235
=> 26x = 1235 - 325
=> 26x = 910
=> x = 910 : 26
=> x = 35