Ta có : \(x=3210+5\left(\dfrac{1230}{3}.2-\dfrac{220}{5}\right)=3210+5.776=3210+3880=7090\)
Vậy ...
X - 5 x (1230 : 3 x 2 - 220 : 5) = 3210
X - 410 x 2 x 5 - 220 : 5 x 5 = 3210
X - 410 x 10 - 220 = 3210
X - 4100 = 3430
X = 7530
Vậy X = 7530
Ta có: \(x-5\left(1230:3\cdot2-220:5\right)=3210\)
\(\Leftrightarrow x-5\left(820-44\right)=3210\)
\(\Leftrightarrow x-3880=3210\)
hay x=7090
\(x-5.\left(1230:3.2-220:5\right)=3210\)
\(x-5.\left(820-44\right)=3210\)
\(x-5.776=3210\)
\(x-3880=3210\)
\(x=3210+3880\)
\(x=7090\)
