X x 15 + X x 35 = 150
X x ( 15 + 35 ) = 150
X x 50 = 150
x = 150 : 50
x = 3
vay x =3
k nha
Xx(15+35)=150
Xx50=150
X=150:50
X=3
k cho mk
a ) X x 15 + X x 35 = 150 b ) 713 - X x 5 = 173
X x (15 + 35) = 150 X x 5 = 713 – 173
X x 50 = 150 X x 5 = 540
X = 150 : 50 X = 540 : 5
X = 3 X = 108