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X x 3=6/5+3
=>X x 3=6/5+3/1=6/5+15/5=21/5
=>X x 3=21/5
=>X=21/5 : 3=21/5 x 1/3=7/5
Vậy, x = 7/5
$\text{x × 3 = $\dfrac{6}{5}$ + 3}$
$\text{x × 3 = $\dfrac{21}{5}$}$
$\text{x = $\dfrac{21}{5}$ ÷ 3}$
$\text{x = $\dfrac{7}{5}$}$
$\text{Vậy x = $\dfrac{7}{5}$}$
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a x [3+6-1]-1968=3680
a x 8 -1968=3680
ax8=3680+1968
ax8=5648
a=706
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a) x : 6 = 14
x = 14 x 6
x = 84
b) x + 253 = 639
x = 639 - 253
x = 386
c) x - 29 = 56 x 3
x = 56 x 3
x = 168 + 29
x = 197
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=\(3a+6a-1a=3680+1968\)
=\(3a+6a+1a=5648\)
\(a\left(3+6+1\right)=5648\)
\(10a=5648\)
\(a=564,8\)
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2015<x*6+720<2017 x*6+720=2016 x*6=2016-720 x*6=1296 x=1296:6 x=216
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