Penjelasan dengan langkah-langkah:
4x + 38 + 90 = 180
4x + 128 = 180
4x = 180 - 128
4x = 52
x = 52/4
x = 13
x = 13/1
x = 13 => B
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Penjelasan dengan langkah-langkah:
4x + 38 + 90 = 180
4x + 128 = 180
4x = 180 - 128
4x = 52
x = 52/4
x = 13
4x + 38 + 90 = 180
4x + 128 = 180
4x = 180 - 128
4x = 52
x = 52/4
x = 13/1
x = 13 => B