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180 = 62 + 2x
118 = 2x
x = 59 (a)
2×+5 derajat+ 57 derajat = 180 derajat
2x + 62 derajat = 180 derajat
2x = 180 derajat - 62 derajat
2x/2 = 118 derajat/2
× = 59 derajat
semoga bermanfaat :)