I don’t know if this is correct. Please help

Which of the following correctly justifies statement four of the two column proof? a. corresponding angles theorem b. transitive property of equality c. vertical angle theorem d. substitution property of equality

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Solve the equation for x.3(6x - 1) = 12 i've tried doing the math and i can't find out what i'm doing wrong