2)a) 210-5.x=200
b) 210:x-10=20
c) 210-5.(x-10)=200
d) (2x+1):7=2^2+3^2
e) 450:[41-(2x-5)]=3^2.5
f) (5x-39).7+3=80
2)a) 210-5.x=200
b) 210:x-10=20
c) 210-5.(x-10)=200
d) (2x+1):7=2^2+3^2
e) 450:[41-(2x-5)]=3^2.5
f) (5x-39).7+3=80
a) x=2
b) x=7
c) x=12
d) x=45
e) x=18
f) x=10
Đáp án: a)x=2
b)x=7
c)x=12
d) x=45
e)x= 18
f)x=10
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