\(a.x\times6+x:0,25=27,9\)
\(x\times6+x\times4=27,9\)
\(x\times\left(6+4\right)=27,9\)
\(x\times10=27,9\)
\(x=27,9:10\)
\(x=2,79\)
b. \(32,9:x+3,16=12,56\)
\(32,9:x=12,56-3,16\)
\(32,9:x=9,4\)
\(x=32,9:9,4\)
\(x=3,5\)
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