2. Find the value of x if (3x+20) and (4x-3) are complementary to each other.
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Step-by-step explanation:
i guess it's supplementary angles not complementary.
Given :-
two supplementary angles are (3x + 40)° and (x - 20)°
here, we've to find the value of x.
we know that the sum of two supplementary angles is 180°
therefore, (3x + 40)° + (x - 20)° = 180°
⇒3x + 40 + x - 20 = 180°
⇒ 4x + 20 = 180°
⇒ 4x = 180 - 20
⇒ 4x = 180 - 20
⇒ 4x = 160
⇒ x = 160/4
⇒ x = 40°
if it's complementary angles. then x would be 17.5° which is not possible ∵ one of the given complementary angle is x - 20. 17.5 - 20 = -2.5° and angles can't be negative.
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