Ngo Thi Hanh SAi bet Roi
(x-299):9.63x0.9=0.18
(x-299):9.63 =0.18:0.9
(x-299):9.63 = 0.2
x-299 =0.2x9.63
x-299 = 1.926
x = 1.926 + 299
x = 300.926
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