25%×x+x+21,5=36,5
0,25 x X + X + 21,5 = 36,5
1,25 x X = 36,5 - 21,5
1,25 x X = 15
X= 15: 1,25
X=12
25% x \(x+x+21,5=36,5\)
0,25 \(\times x+x+21,5=36,5\)
\(x\times\left(1+0,25\right)+21,5=36,5\)
\(x\times1,25\) = 36,5 - 21,5
\(x\times1,25\) = 15
\(x\) = 15 : 1,25
\(x\) = 12
25%×x+x+21,5=36,5
0,25 x X + X + 21,5 = 36,5
1,25 x X = 36,5 - 21,5
1,25 x X = 15
X= 15: 1,25
X=12
Hok tốt!