Question

X x 2,5 + X x 4 =13 Giúp mình bài này với mn

Answer 1

\(x\times2,5+x\times4=13\)

\(\Leftrightarrow x\times\left(2,5+4\right)=13\)

\(\Leftrightarrow x\times6,5=13\)

\(\Leftrightarrow x=13:6,5\)

\(\Leftrightarrow x=2\)

Answer 2

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