Question

Tìm x: X : 0,2 + X x 4= 36

X : 0,25 - X x 3=18

Giúp mình với ạ

Answer 1

a.X x 5 + X x4 = 36

X (5+4) = 36 

X = 4

b. X x 4 - X x3 =  18

X (4-3) = 18

X = 18

 

Answer 2

X :0,2 + x X 4=36

X :2/10+x x 4=36

x x10/2+x x 4 =36

x x5 + x x4 =36

x x (4+5)=36

x x 9 =36

x=36:9

x=4

 

 

x :0.25 - x x 3 =18

x:25/100- x x 3=18 

x x100/25- x x 3=18

x x 4- x x 3 =18

x x(4-3)=18

x x 1=18

x=18:1

x=18