Look : angle 1 + angle 3 = 180°
because it is a straight line.
Thus ;
![5x + 35 + 4x + 10 = 180](https://img.qammunity.org/2021/formulas/mathematics/high-school/g8or2v0e7fzcorgdk22ie89advek6vs0pf.png)
Simplification
![9x + 45 = 180](https://img.qammunity.org/2021/formulas/mathematics/high-school/9rtjm8sywy072hozdyqrb2a47s84cl221h.png)
Subtract sides 45
![9 x = 180 - 45](https://img.qammunity.org/2021/formulas/mathematics/high-school/z75e73j5yl05isa9foq8q3ofjbkcfkue8v.png)
![9x = 135](https://img.qammunity.org/2021/formulas/mathematics/high-school/nhh3takohz7xm79e73rug5o9ctoxxcpy86.png)
Divided sides 9
![(9)/(9)x = (135)/(9) \\](https://img.qammunity.org/2021/formulas/mathematics/high-school/50fsypnepbd1gmc3tescc01uhlqcgxp23t.png)
![x = 15](https://img.qammunity.org/2021/formulas/mathematics/college/c6krwnf00lnhfhu9m2m17tgxdlx8wp07gu.png)
So x = 15°
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angle 1 = 5x + 35°
angle 1 = 5 ( 15 ) + 35°
angle 1 = 75° + 35°
angle 1 = 110°
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angle 1 + angle 2 = 180°
110° + angle 2 = 180°
Subtract sides 110°
angle 2 = 180° - 110°
angle 2 = 70°
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And we're done...♥️♥️♥️♥️♥️