(8x-6)+2•(6-8x)при х=4

To evaluate the expression (8x-6)+2*(6-8x) when x=4, we substitute x=4 into the expression:

(84 - 6) + 2(6 - 84)
= (32 - 6) + 2(6 - 32)
= 26 + 2*(-26)
= 26 - 52
= -26

Therefore, when x=4, the value of the expression (8x-6)+2*(6-8x) is -26.