( 5,4 - 4 - 5,4 + 4 ) : 5,4 = 1 + 1 ( - 4 + 4 ) =
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\frac{1,4-5,4+4}{5,4}=1+1\left(-4+4\right)
Subtract 4 from 5,4 to get 1,4.
\frac{-4+4}{5,4}=1+1\left(-4+4\right)
Subtract 5,4 from 1,4 to get -4.
\frac{0}{5,4}=1+1\left(-4+4\right)
Add -4 and 4 to get 0.
0=1+1\left(-4+4\right)
Zero divided by any non-zero number gives zero.
0=1+1\times 0
Add -4 and 4 to get 0.
0=1+0
Multiply 1 and 0 to get 0.
0=1
Add 1 and 0 to get 1.
\text{false}
Compare 0 and 1.
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