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124xy=4829-365
124 x y = 4464
y=4464:124
y=36
2652:y=26
y=2652:26
y=102
124y = 4464
y = 4464 : 124
y = 36
--------------------------
2652 : y = 26
y = 2652 : 26
y = 102
124 * y = 4829 - 365
124 * y = 4464
y = 4464 :124
y = 36
k mình nhaaaaaaaaaaaa!
1,
a, \(x\)x 124= 4829-365
\(x\)x 124 = 4464
\(x\)= 4464 :124
\(x\)= 36.
b,\(x\)x 137 = 25 x 3
\(x\)x 137 = 75
\(x\)= \(\frac{75}{137}\)
2,
\(\frac{4}{5}\)x\(\frac{3}{7}+\frac{4}{5}\)x\(\frac{6}{7}-\frac{4}{5}\)x\(\frac{4}{10}\)
=\(\frac{4}{5}\)x\(\left(\frac{3}{7}+\frac{6}{7}-\frac{4}{10}\right)\)=\(\frac{4}{5}\)x\(\frac{31}{35}\)\(\frac{124}{175}\)
\(\text{Bài }1\text{ : Tìm }x\text{ : }\)
\(a,\text{ }x\text{ x }124=4829-365\)
\(x\text{ x }124=4464\)
\(x=4464\text{ : }124\)
\(x=36\)
\(b,\text{ }x\text{ x }137=25\text{ x }3\)
\(x\text{ x }137=75\)
\(x=75\text{ : }137\)
\(x=\frac{75}{137}\)
\(\text{Bài }2\text{ : Tính bằng cách thuận tiện nhất : }\)
\(\frac{4}{5}\text{ x }\frac{3}{7}+\frac{4}{5}\text{ x }\frac{6}{7}-\frac{4}{5}\text{ x }\frac{4}{10}\)
\(=\frac{4}{5}\text{ x }\left(\frac{3}{7}+\frac{6}{7}-\frac{4}{10}\right)\)
\(=\frac{4}{5}\text{ x }\left(\frac{9}{7}-\frac{4}{10}\right)\)
\(=\frac{4}{5}\text{ x }\frac{31}{35}\)
\(=\frac{124}{175}\)
a,5/7 x 3/5 - 10/14 x 2/5
=3/7 - 2/7=1/7
b,y - 11/5=2/5 : 2/3
y - 11/5=3/5
y=3/5+11/5
y=14/5
=\(\frac{5x3x10x2}{7x5x14x15}\)
=\(\frac{5x3x5x2x2}{7x5x7x2x5x3}\)
=\(\frac{2}{49}\)
b.y-\(\frac{11}{5}\)=\(\frac{3}{5}\)
y=\(\frac{3}{5}\)+\(\frac{11}{5}\)
y=\(\frac{14}{5}\)
hoktot
x : 123 = 2009 3 : x = 2/3 + 49
x = 2009 x 123 3 : x = 149/3
x = 247 107 x = 3 : 149/3
x = 149
~ Hok T ~
a) 4 829 - 124 x y = 365
=> 124 x y = 4 829 - 365 = 4 464
=> y = 4 464 : 124 = 36
Vậy y = 36
b) 2 652 : y = 13 x 2
=> 2 652 : y = 26
=> y = 2 652 : 26
=> y = 102
Vậy y = 102