x : 0,25 + x × 6 = 12,6
x × 4 + x × 6 = 12,6
x × (4 + 6) = 12,6
x × 10 = 12,6
x = 12,6 : 10
x = 1,26
\(x:0,25+x\times6=12,6\)
\(=>x\times4+x\times6=12,6\)
\(=>x\times\left(4+6\right)=12,6\)
\(=>x\times10=12,6\)
\(=>x=12,6:10\)
\(=>x=1,26\)
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