a)x-289=0 d)31+x=928-128
x =0+289 x=800-31
x =289 x=769
Vây x=289 Vậy x=769
b)84-x=54:54 e)5x=1505
84-x=1 x=301
x=84-1 Vậy x=301
x=83 f)4.x=4088
Vậy x=83 x=1022
c)7.x=704+10 Vậy x=1022
x=714:7 nha!
x=102
Vậy x=102
(x-289).47=0
x-289=0:47
x-289=0
\(\Rightarrow\)x=0+289
Vậy x=289
54.(84-x)=54
84-x=54:54
84-x=1
\(\Rightarrow\)x=84-1
Vậy x=83
7.x-10=704
7.x=704+10
7.x=714
\(\Rightarrow\)x=714:7
Vậy x=102
928-(31+x)=128
31+x=928-128
31+x=800
\(\Rightarrow\)x= 800-31
Vậy x=769
2.x+3.x=1505
(2+3).x=1505
5.x=1505
\(\Rightarrow\)x=1505:5
Vậy x= 301
5.x-x=4088
(5-1).x=4088
4.x=4088
x=4088:4
Vậy x= 1022
a)(x-289).47=0
=>x-289=0
=>x=289
b)54. (84-x)=54
=>84-x=1
=>x=83
c)7.x-10=704
=>7*x=714
=>x=102
d)928-(31+x)=128
=>31+x=800
=>x=769
e)2.x+3.x=1505
=>x(2+3)=1505
=>x*5=1505
=>x=301
g)5.x-x=4088
=>x(5-1)=4088
=>x*4=4088
=>x=1022
a)(x-289).47=0
=>x-289=0
=>x=289
b)54. (84-x)=54
=>84-x=1
=>x=83
c)7.x-10=704
=>7*x=714
=>x=102
d)928-(31+x)=128
=>31+x=800
=>x=769
e)2.x+3.x=1505
=>x(2+3)=1505
=>x*5=1505
=>x=301
g)5.x-x=4088
=>x(5-1)=4088
=>x*4=4088
=>x=1022
a)(x-289).47=0
=>x-289=0
=>x=289
b)54. (84-x)=54
=>84-x=1
=>x=83
c)7.x-10=704
=>7*x=714
=>x=102
d)928-(31+x)=128
=>31+x=800
=>x=769
e)2.x+3.x=1505
=>x(2+3)=1505
=>x*5=1505
=>x=301
g)5.x-x=4088
=>x(5-1)=4088
=>x*4=4088
=>x=1022
