x + 20% * x = 7.2
x +1/5 * x = 7.2
x * ( 1 + 1/5 ) = 7.2
x * 1.2 = 7.2
x = 7.2 : 1.2
x = 6
40% * x + x * 20% = 72
2/5 * x + x * 1/5 = 72
( 2/5 + 1/5 ) * x = 72
0.6 * x = 72
x = 72 : 0.6
x = 120
Tim X
a,X - 20/11 x 13 - 20/13 x 15 - 20/15 x 17 -...-20/53 x 55 = 3/11
b,1/21 + 1/28 +1/36 + ... +2/Xx(x + 1) = 2/9
X+20%xX=7.2
tim x
tìm x:
a, X+20%xX=7,2
b,40%xX+X+20%=7,2
giúp mk nhé mai nộp rùi
40%xX+X nhan 20%=72
B. 54,3 x4,7+54,3x4,3+54,3(Bang cach thuan tien nha)
Ai giai ho minh hai bai nha
X+20%+x=7,2
40%×X+X×20%=72
Tìm x
a) x + 20% + x = 7,2
b) 40% * x + x * 20% = 72
tìm x
a, 40%*x+x *20%=72
b, x-20%*x =216
Tìm X
a, X+20%*X=7,2 ; b, 40%*X+X*20%=72
Tìm X
a, X + 20% x X = 7,2
b, X x 4 + 1/2 x X= 55,35
c,40% x X + X x 20% = 72
d, X - 20% x X = 216