Identify Equation: We have the equation 1=z+6. Identify the equation after substituting z=7.Substitute 7 for z in 1=z+6.Equation: 1=7+6
Substitute z=7: Simplify 7+6.7+6=13
Simplify Expression: We found: 1=13Is z=7 a solution to the equation 1=z+6?For z=7, the equation becomes 1=13, which is not true.So, z=7 is not a solution to the equation 1=z+6.