7Z+1-Z=2z-7
is z = -2
7Z+1-Z=2z-7
7Z - Z - 2Z = -7 + (-1)
4Z = -6
Take it from there,
Z=-1.5
Right!
To check if z = -2 is a solution to the equation 7z + 1 - z = 2z - 7, we can substitute z = -2 into the equation and simplify both sides.
Substituting z = -2 into the equation:
7(-2) + 1 - (-2) = 2(-2) - 7
Simplifying both sides:
-14 + 1 + 2 = -4 - 7
-11 + 3 = -11
-8 ≠ -11
Since -8 is not equal to -11, z = -2 is not a solution to the equation 7z + 1 - z = 2z - 7.