15.x+19.x=39440
x.(15+19)=39440
x.34=39440
x=39440:34
x=1160
vậy x=1160
x=1160
nhanh
gọn
lẹ
15xX+19xX=39440
Xx(15+19)=39440
Xx34=39440
X=39440:34
X=1160
Vậy X=1160.
15 X x + 19 X x = 39440
x X (15+19) =39440
x X 34 =39440
x =\(\frac{39440}{34}\)
x =1160
15 . x + 19 . x = 39440
(15 + 19) . x = 39440
34 . x = 39440
x = 39440 : 34
x = 1160
#Hoc tot!!!
~NTTH~
\(15x+19x=39440\)
\(\Rightarrow x.\left(15+19\right)=39440\)
\(\Rightarrow x.34=39440\)
\(\Rightarrow x=39440:34\)
\(\Rightarrow x=1160\)