6x + 1 - 5x = 7 when x = 2
To check this answer, you simply need to plug in 2 for x in the original equation.
6x + 1 - 5x = 7
6(2) + 1 - 5(2) = 7
Simplify.
12 + 1 - 10 = 7
Simplify.
13 - 10 = 7
Simplify.
3 = 7
3 ≠ 7 Therefore x does NOT equal 2.
~Hope I helped!~