(6x-11^2).5^3=5^6
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5 tháng 5 2019
\(\frac{6}{11}\cdot\frac{3}{14}+\frac{-5}{16}+\frac{3}{14}\cdot\frac{5}{11}+\frac{-3}{16}\)
\(=\frac{6}{11}\cdot\frac{3}{14}+\frac{3}{14}\cdot\frac{5}{11}+\frac{-5}{16}+\frac{-3}{16}\)
\(=\frac{3}{14}\cdot\left(\frac{6}{11}+\frac{5}{11}\right)+\left(\frac{-5}{16}+\frac{-3}{16}\right)\)
\(=\frac{3}{14}\cdot\frac{6+5}{11}+\frac{-5+\left(-3\right)}{16}\)
\(=\frac{3}{14}\cdot\frac{11}{11}+\frac{-8}{16}\)
\(=\frac{3}{14}\cdot1+\frac{-1}{2}\)
\(=\frac{3}{14}+\frac{-1}{2}\)
\(=\frac{3}{14}+\frac{-7}{14}\)
\(=\frac{3+\left(-7\right)}{14}\)\(=\frac{-4}{14}=\frac{-2}{7}\)
5 tháng 5 2019
\(\frac{-5}{6}+\left(7x-\frac{1}{2}\right)\cdot\frac{2}{9}=-1\frac{1}{3}\)
\(\frac{-5}{6}+\frac{14}{9}\cdot x-\frac{1}{9}=-\frac{4}{3}\)
\(\frac{14}{9}\cdot x-\frac{1}{9}=-\frac{4}{3}+\frac{5}{6}\)
\(\frac{14}{9}\cdot x-\frac{1}{9}=-\frac{1}{2}\)
\(\frac{14}{9}\cdot x=-\frac{1}{2}+\frac{1}{9}\)
\(\frac{14}{9}\cdot x=-\frac{7}{18}\)
\(x=-\frac{7}{18}:\frac{14}{9}\)
\(x=-\frac{1}{4}\)
23 tháng 5 2017
\(6x+x=5^{11}:5^9+3^1\)
\(\Leftrightarrow7x=5^2+3\)
\(\Leftrightarrow7x=28\)
\(\Leftrightarrow x=\frac{28}{4}\)
\(\Leftrightarrow x=7\)
\(5x+2x=6^2+5^0\)
\(\Leftrightarrow7x=36+1\)
\(\Leftrightarrow7x=37\)
\(\Leftrightarrow x=\frac{37}{7}\)
23 tháng 5 2017
\(6x+x=5^{11}:5^9+3^1\)
\(6x+x=5^{11-9}+3^1\)
\(6x+x=5^2+3^1\)
\(6x+x=25+3\)
\(6x+x=28\)
\(\left(6+1\right).2x=28\)
\(7.2x=28\)
\(2x=28:7\)
\(2x=4\)
\(x=4:2\)\(x=2\)
2 tháng 1 2023
2: 12-10x=25-30x
=>20x=13
=>x=13/20
3: \(3\left(2x+3\right)-2\left(4x-5\right)=10x+21\)
=>6x+9-8x+10=10x+21
=>10x+21=-2x+19
=>12x=-2
=>x=-1/6
4: \(\Leftrightarrow25x-15-6x+12=11-5x\)
=>19x-3=11-5x
=>24x=14
=>x=7/12
5: \(\Leftrightarrow8-12x-5+10x=4-6x\)
=>4-6x=-2x+3
=>-4x=-1
=>x=1/4
6: \(\Leftrightarrow32x-24-6+9x=13-40x\)
=>41x-30=13-40x
=>81x=43
=>x=43/81
7: \(\Leftrightarrow10x-5+20x=5x-11\)
=>30x-5=5x-11
=>25x=-6
=>x=-6/25
4 tháng 12 2016
7x - 2x = 617 : 615 + 44 : 11
x(7 - 2) = 62 + 4
5x = 36 + 4
5x = 40
x = 40 : 5 = 8
minh cung lop 6 nhung minh khong biet lam bai nay , vi minh chua hoc den
ai lam cho minh hieu di
\(\left(6x-11^2\right).5^3=5^6\)
\(\Leftrightarrow6x-11^2=5^6:5^3\)
\(\Leftrightarrow6x-11^2=5^3\)
\(\Leftrightarrow6x=5^3+11^2\)
\(\Leftrightarrow6x=246\)
\(\Leftrightarrow x=\frac{246}{6}=41\)