Penjelasan dengan langkah-langkah:
80 + 60 + 2y = 180
140 + 2y = 180
2y = 180 - 140
2y = 40
y = 40÷2
y = 20
sehingga x + y + z
20 + 20 + 20
40 + 20
=60⁰
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Penjelasan dengan langkah-langkah:
80 + 60 + 2y = 180
140 + 2y = 180
2y = 180 - 140
2y = 40
y = 40÷2
y = 20
sehingga x + y + z
20 + 20 + 20
40 + 20
=60⁰