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a.
2x° = 46°
x° = 23°
3y° = 39°
y° = 13°
b.
3x° = (x + 32)°
3x° − x° = 32°
2x° = 32°
x° = 16°
4y° + 3x° = 180°
4y° + 3∙16° = 180°
4y° + 48° = 180°
4y° = 180° − 48°
4y° = 132°
y° = 33°