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a; (-2,5.0,38.0,4) - {0,125.3,15.(-8)}
= (-2.5.0,4).0,38 - {-8.0,125.3,15}
= - 1.0,38 - {-1.3,15}
= -0,38 + 3,15
= 2,77
b; {(-20,83).0,2 + (-9,17).0,2 : {2,47.0,5 - (-3,53.0,5}
= {0,2.(-20,83 - 9,17)}: {0,5.(2,47 + 3,53)}
= {- 0,2.30}:{0,5.6}
= - 6:6 : 0,5
= -1 : 0,5
= - 2
a,2xX-7/4=11/6
=> 2x = 11/6 + 7/4
=> 2x = 43/12
=> x = 43/24
a: \(=\dfrac{\left(1.6-1.6\right)\cdot\left(2.29-0.76\right)}{1.6+2.53}\cdot\dfrac{3.06:7.5+3.4\cdot0.38}{19-2.6\cdot0.5}=0\)
b: \(=\dfrac{17.8\cdot9.4-7.8\cdot9}{3-0.3\cdot0.3}=\dfrac{97.12}{2.4}=\dfrac{607}{15}\)
* \(\dfrac{15}{12}:x=\left(\dfrac{5}{6}-\dfrac{1}{2}\right).\dfrac{5}{4}\)
\(\dfrac{15}{12}:x=\dfrac{1}{3}.\dfrac{5}{4}\)
\(\dfrac{15}{12}:x=\dfrac{5}{12}\)
\(x=\dfrac{15}{12}:\dfrac{5}{12}\)
\(x=3\)
* \(y:0,15=\left(2,8+0,38\right):0,75\)
\(y:0,15=3,18:0,75\)
\(y:15=4,24\)
\(y=4,24.15\)
\(y=63,6\)
\(=X:\left(\frac{185}{46}+\frac{74}{23}+84+4,6\right)=0,1\)\(1\)
\(X=0,1.\frac{22043}{230}\)
\(X=9,583913043\)
(10,38+12,58+14,8)-(0,38+4,48+2,58)
=10,38+12,58+14,8-0,38-4,48-2,58
=10,38-0,38+12,58-2,58+14,48-4,48
=10+10+10=30