Bài 5: Tìm X
X x 27 + X x 30 + X x 43 = 210500 | 128 x X - 12 x X – 16 x X = 5208000 |
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a)\(\Leftrightarrow\)\(x(27+30+43)=210500\)
\(\Leftrightarrow\)\(100x=210500\)
\(\Leftrightarrow\)\(x=2105\)
b)\(\Leftrightarrow\)\(x(128-12-16)=5208000\)
\(\Leftrightarrow\)\(100x=5208000\)
\(\Leftrightarrow\)\(x=52080\)
\(x\times27+x\times30+x\times43=210500\)
\(\Leftrightarrow x\times\left(27+30+43\right)=210500\)
\(\Leftrightarrow x\times100=210500\)
\(\Leftrightarrow x=2105\)
a: 27x+30x+43x=210500
nên 100x=210500
hay x=2105
b: 128x-12x-16x=5208000
nên 100x=5208000
hay x=52080
