Question

What is the x for question 12

Answer 1

x = 21 and angle QXS = 40°

angle QXT = angle QXS + angle SXT

that is 2x - 2 + 4x + 1 = 125

6x - 1 = 125

add 1 to both sides

6x = 125 + 1 = 126

divide both sides by 6

x =
`(126)/(6)` = 21

angle QXS = 2x - 2 = (2 × 21) - 2 = 42 - 2 = 40°