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\(\left(\frac{12}{19}.\frac{19}{12}\right).\left(\frac{-13}{17}.\frac{17}{13}\right).\frac{7}{15}\)
\(=1.\left(-1\right).\frac{7}{15}\)
\(=-\frac{7}{15}\)
\(A=\frac{7}{19}.\frac{8}{11}.\frac{7}{19}:\frac{3}{11}+\frac{12}{19}\)
\(A=\left(\frac{7}{19}\right)^2.\frac{8}{11}.\frac{11}{3}+\frac{12}{19}\)
\(\Rightarrow A=\left(\frac{7}{19}\right)^2.\frac{8}{3}+\frac{12}{19}\)
\(\Rightarrow A=\frac{392}{1083}+\frac{12}{19}\)
\(\Rightarrow A=\frac{1076}{1083}\)
\(A=\frac{56}{209}x\frac{7}{19}:\frac{3}{11}+\frac{12}{19}\)
\(A=\frac{392}{3971}:\frac{3}{11}+\frac{12}{19}\)
\(A=\frac{392}{1083}+\frac{12}{19}\)
\(A=\frac{1076}{1083}\)
a)\(-x+\left(-53\right)=\left(-42\right)-41\Rightarrow-x+\left(-53\right)=\left(-83\right)\Rightarrow x=\left(-83\right)-\left(-53\right)=-30\)b) \(-12-x=-32+19\Rightarrow-12-x=-13\Rightarrow x=12--13=25\)c)\(453+x=-443+-199\Rightarrow453+x=-562\Rightarrow x=-562-453=-1015\)d)(đề trùng b mk ko làm nha)
e) \(32.\left(-2\right)+x=-120-5.\left(-85\right)\Rightarrow-64+x=545\Rightarrow x=545--64=609\)g)
\(-2x+15.\left(-4\right)=21.\left(-8\right)-12\Rightarrow-2x+-60=-180\Rightarrow2x=-120\Rightarrow x=-60\)
a) x \(\in\) {-6;-5;...;8;9}
b) x \(\in\) {-11;-10;...;5;6}
c) x \(\in\) {-18;-17;...;17;18}
d) x \(\in\) {-14;-13;...;13;14}
e , 12 x 35 + 35 x 182 - 35 x 94
= 35 x ( 12 + 182 - 94 )
= 35 x 100
= 3500.
n , 19 x 27 + 47 x 81 + 19 x 20
= 19 x 27 + 19 x 20 + 47 x 81
= 19 x ( 27 + 20 ) + 47 x 81
= 19 x 47 + 47 x 81
= 47 x ( 19 + 81 )
= 47 x 100
= 4700.
T I C K cho mik nha !
~ HT ~
\(x-\frac{x}{3}=\frac{3}{57}:\frac{12}{19}\)
\(\Leftrightarrow x-\frac{x}{3}=\frac{1}{19}\)
\(\Leftrightarrow\frac{2x}{3}=\frac{1}{19}\)
\(\Leftrightarrow2x.19=1.3\)
\(\Leftrightarrow2x.19=3\)
\(\Leftrightarrow2x=\frac{3}{19}\)
\(\Leftrightarrow x=\frac{3}{38}\)
Vậy: \(x=\frac{3}{38}\)
\(x-\frac{x}{3}=\frac{3}{57}:\frac{12}{19}\)
\(\frac{3x}{3}-\frac{x}{3}=\frac{3}{57}.\frac{19}{12}\)
\(\frac{2x}{3}=\frac{1}{12}\)
\(2x.12=1.3\)
\(24x=3\)
\(x=\frac{3}{24}=\frac{1}{8}\)
Vậy \(x=\frac{1}{8}\)
( -12 ) - x = 19
x = ( - 12 ) - 19
x = - 31
Vaayj x = - 31
(-12)-x=-19
x=(-12)-19
x = - 31
vậy x = -31