Question

Bài 1 : giải phương trình

a) 7x-63=0

b)3x+15=0
c) 2x-5
d) -6x+16=0

Answer 1

a: =>7x=63

hay x=9

b: =>3x=-15

hay x=-5

d: =>-6x=-16

hay x=8/3

Answer 2

a) \(7x=63\Leftrightarrow x=9\)

b) \(3x=-15\Leftrightarrow x=-5\)

c) \(2x-5=0\Leftrightarrow2x=5\Leftrightarrow x=\dfrac{5}{2}\)

d) \(-6x=-16\Leftrightarrow x=\dfrac{8}{3}\)

Answer 3