tìm x
a.(x+ 7/4) x2/3 = 6
b. x : 5 /3 + 2/5 = 9/ 5
c .1/ 2 : 3 + x = 5 /3
d .x +4 /5=4 /5+ (3/ 7+3 /5)
e. 5/ 7+x/ 35=4 /5
f .1313/2828+ x =2323/ 4646
g .23/ 69- x =17/ 153
tìm x
a.(x+ 7/4) x2/3 = 6
b. x : 5 /3 + 2/5 = 9/ 5
c .1/ 2 : 3 + x = 5 /3
d .x +4 /5=4 /5+ (3/ 7+3 /5)
e. 5/ 7+x/ 35=4 /5
f .1313/2828+ x =2323/ 4646
g .23/ 69- x =17/ 153
Câu hỏi mới
x + 7/4 = 6 : 2/3
x = 9 – 7/4
x = 36/4 – 7/4
x = 29/4
b. x : 5/3 + 2/5 = 9/5
x : 5/3 = 9/5 – 2/5
x : 5/3 = 7/5
x = 7/5 x 5/3
x = 7/3
c. 1/2 : 3 + x = 5/3
1/2 x 1/3 + x = 5/3
1/6 + x = 5/3
x = 5/3 – 1/6
x = 10/6 – 1/6
x = 9/6
x = 3/2
d. x + 4/5 = 4/5 + ( 3/7 + 3/5 )
x + 4/5 = 4/5 + ( 15/35 + 21/35 )
x + 4/5 = 4/5 + 36/5
=> x = 36/5
e. 5/7 + x/35 = 4/5
x/35 = 4/5 – 5/7
x/35 = 3/35
=> x = 3
f. 1313/2828 + x = 2323/4646
13/28 + x = 1/2
x = 1/2 – 13/28
g. 23/69 – x = 17/153
1/3 – x = 1/9
x = 1/3 – 1/9
x = 2/9