Graphic algebra problems. Normal

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1 = 12 + 1 - 3 x emoji_u1f32d.png
emoji_u1f354.png + 3 = 18 - 2 - 2 x emoji_u1f32d.png
2 x emoji_u1f32e.png + 3 = 21 - 1 - emoji_u1f354.png
Can you calculate the value of each of the elements?
emoji_u1f32d.png =
emoji_u1f354.png =
emoji_u1f32e.png =