The body motion control is given in the form x = 8-7t. determine the initial coordinate of the body

The body motion control is given in the form x = 8-7t. determine the initial coordinate of the body, the speed of movement and movement of the body in 6 seconds.

if the motion is uniform rectilinear, then:
X0 = 8m
V (speed) = -7m / s
For T = 6 s we get: S = VT = 7 * 6 = 42 (m)
if you need to find the coordinate in 6 s, then we get the following: x = 8-7 * 6 = 8-42 = -34 (m)