Question

maths
please friend solve paper all questions

Answer 1

Hi riya

Question no.11

since x and y form a linear pair

there sum must be 180°

according to question ,

=> 2x+30° = y

=> x = (y-30°)/2

x+y = 180° (as x and y form a linear pair)

=> (y-30°)/2 + y = 180°

=> (y-30°)/2 +2y/2 = 180°

=> (y-30°+2y)/2 = 180°

=> (3y-30°)/2 = 180°

=> 3y-30° = 2(180°)

=> 3y = 360°+30° => 390°

y = 390°/3 => 130°

if y = 130°

then, x = (y-30°)/2

=> x = (130-30)/2

=> x = 100°/2 => 50°

we could have taken it out the easier way , as ,

x+y = 180°

=> x+130° = 180°

=> x = 50°

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