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  • 21-09-2018
  • Mathematics
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What is the x for question 12

What is the x for question 12 class=

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jimrgrant1 jimrgrant1
  • 21-09-2018

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 = [tex]\frac{126}{6}[/tex] = 21

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


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