Tìm x:
\(8,75 \times x + 1,25 \times x = 20\)
\(8,75 \times x + 1,25 \times x = 20 \)
\( \left({8,75 + 1,25} \right) \times x = 20 \)
\( 10 \times x\; = 20 \)
\( \;x = 20:10 \)
\( \;x = 2\)
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