(25-x)4=60 (x-4):4=4
25-x=15 x-4=16
x=10 x=20
22.x+32.x=52
x(4+9)=52
13x=52
x=4
25 - x = 60 : 4
25 - x = 15
x = 25 - 15
x = 10
Vậy x = 10
b) x - 4 = 4 . 4
x - 4 = 16
x = 16 : 4
x = 4
vậy x = 4
a,(25-x).4=60
25-x=60:4=15
x=10
b,(x-4):4=4
x-4=4.4
x=20
c,2^2.x+3^2.x=52
13.x=52
x=4
d,4^2.x:2=42
16.x=84
x=5,25
a) (25 - x) 4 = 60
25 - x = 60 : 4
25 - x = 15
x = 25 - 15
x = 10
b) (x - 4) : 4 = 4
x - 4 = 4 . 4
x - 4 = 16
x = 16 + 4
x = 20
c) 22 . x + 32 . x = 52
x (22 + 32) = 52
x (4 + 9) = 52
x . 13 = 52
x = 52 :13
x = 4
d) 42 . x : 2 = 42
16 . x : 2 = 42
16 . x = 42 . 2
16 . x = 84
x = 84 : 16
x = 5,25
a) ( 25 - x ) 4 = 60
<=>( 25 - x ) =60:4
<=> 25-x =15
<=> x =25-15
<=> x =10
Vậy x=10
b) ( x - 4 ) : 4 =4
<=> x-4 =4.4
<=> x-4 =16
<=> x =16+4
<=> x = 20
Vậy x=20
c) 2^2 . x + 3^2 . x= 52
<=>4.x+9.x =52
<=> x.(4+9) =52
<=> x.13 =52
<=> x =52:13
<=> x =4
Vậy x=4
d) 4^2 . x :2 = 42
<=> 16.x:2 =42
<=> 16.x =42.2
<=> 16.x =84
<=> x =84:16
<=> x =\(\frac{21}{4}\)
Vậy x =\(\frac{21}{4}\)
mk k chắc phần cuối đâu bạn xem lại nha
