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\(3\cdot x+2\cdot x+x=36.2\)
\(\left(3+2+1\right)\cdot x=36.2\)
\(6\cdot x=36.2\)
\(x=36.2:6\)
\(x=\frac{181}{30}\)
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a,64 x 25 + 35 x 25 +25=25.(64+35+1)=25.100=2500
b) 58 x 42 + 32 x 8 + 5=2436+256+5=2697
c) A =1 +2+3+4+...+100=(100+1)x[(100-1):1+1]:2=5050
\(64\times25+35\times25+25\)
\(=25\times\left(64+35+1\right)\)
\(=25\times100\)
\(=2500\)
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0,8175 + 2,3 x 25 + 1,75 = 0,8175 + 57,5 + 1,75
= 58,3175 + 1,75
= 60,0675
3,27 x 0,25 + 2,3 x 0,25 + 1,75
= 0,8175 + 0,575 + 1,75
= 3,1425
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a) y : 10 + y x 3,9 = 4,8
y x 0,1 + y x 3,9 = 4,8
y x ( 0,1 + 3,9 ) = 4,8
y x 4 = 4,8
y = 1,2
b)y : 0,25 + y x 11 = 24
y x 4 + y x 11 = 24
y x ( 4 + 11 ) = 24
y x 15 = 24
y = 1,6
c) 75% x y + 3/4 x y + y = 30
3/4 x y + 3/4 x y + y x 1 = 30
y x ( 3/4 + 3/4 + 1 ) = 30
y x 2,5 = 30
y = 12
\(y:0,25+y.11=24\)
\(\Leftrightarrow y.4+y.11=24\)
\(\Leftrightarrow y.\left(4+11\right)=24\)
\(\Leftrightarrow y.15=24\)
\(\Leftrightarrow y=\frac{24}{15}=\frac{8}{5}\)
0,25×62,8+36,2×14+25%0,25×62,8+36,2×14+25%
=0,25×62,8+36,2×(1:4)+25100=0,25×62,8+36,2×(1:4)+25100
=0,25×62,8+36,2×0,25+14=0,25×62,8+36,2×0,25+14
=0,25×(62,8+36,2)+(1:4)=0,25×(62,8+36,2)+(1:4)
=0,25×99+0,25=0,25×99+0,25
=0,25×(99+1)=0,25×(99+1)
=0,25×100=0,25×100
=25