Question

pls solve fast I will mark as brainliest​

Answer 1

Answer:

We know sum of Angles of a triangle is 180°

3x+x+40°=180°

4x=180°-40°

4x=140°

x=140°/4=35°

Answer 2

Answer:

$\huge\underbrace\pink{\dag Answer \dag}$

$3x + x + 40 = 180 \: \: (linear \: pair) \\ \sf { \implies { 4x = 180}} \\ \sf { \implies {x = \frac{180}{4} } } \\ \sf { \implies {\boxed{x = 45}}}$

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