Question

Se dois ângulos opostos pelo vértice medem 105° e 5x - 45°, então a medida de x é?

Answer 1

$\[\\105=5x-45 \\-5x=-45-105 \\-5x=-150 (-1) \\5x=150 \\\\x=\frac{150}{5} \\\\\boxed{x=30}\]$

Answer 2

105=5x-45
5x=150
x=30°