What value of x makes 3(x + 4) = 3x + 4 true?

Why is x= 4 a solution to the proportion 14/x 56/1 6

Identify reflection rule on a coordinate plane that verifies that triangle a(-1,7), b(6,5), c(-2,2) and a’(-1,-7), b(6,-5), c’(-2,2) triangle are congruent when reflected over the x-axis

At the play,8 students from mr. franks room got a seat. if there were 17 childern from room 24,how many childern did not get a seat ?