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22 + 11 = x + x
33 = 2 x
33/2 = x
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B) 4x - 20 = 6x - 80
-20 + 80 = 6x - 4x
60 = 2x
30 = x
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C) 11x - 12 = x + 138
11x -x = 138 + 12
10x = 150
x = 15
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D) 6x + 1 = 12 - 5x
6x + 5x = 12 -1
11x = 11
x = 1
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Espero que te sirva las respuestas