Question

PLEASE SOLVE FOR BRAINLIEST

Answer 1

Apply angle sum property

$\\ \tt\Rrightarrow 4x-12+63+45=180$

$\\ \tt\Rrightarrow 4x+51+45=180$

$\\ \tt\Rrightarrow 4x+96=180$

$\\ \tt\Rrightarrow 4x=84$

$\\ \tt\Rrightarrow x=21$

Answer 2

Answer:

x = 21°

Explanation:

All the interior angles of the triangle sum up to 180°

45 + 63 + 4x -12 = 180°

96° + 4x = 180°

4x = 180° - 96°

4x = 84°

x = 21°