3/4a-1)5a=-10
15/20a-4/20a=-10
11/20a=-10
a=-10.20/11
a=-200/11
a=-18 2/11
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11/20 a = -200/20
a = - 200/20 x 20/11
a = -200/11
itu ya jawabannya. maaf kalau salah
3/4a-1)5a=-10
15/20a-4/20a=-10
11/20a=-10
a=-10.20/11
a=-200/11
a=-18 2/11