Question

[Tiểu's Ham's Ăn's OvO]

Hộ cái

Jup nha mn nhanh gọn lẹ đg cần gấp

Tinm x E Z,bt:

a) x-14=3x+18 ;è)(x-5)-3(x-4) =-6+15(-3)

b)(x+7)(x-9)=0 ;g)|2x-5|-7=22

c)x(x+3)=0 ; h)-12(x-5)+7(3-x=5

d)(x-2)(5-x)=0 ;i)30(x+2)-6(x-5)-24x=100

Answer 1

[Channel Shinshi]

a) x-14=3x + 18

x - 3x = 18 + 14

-2x = 32

=> x = -16

b) (x+7)(x-9)=0

=> TH1: x+7=0 => x = -7

=> TH2: x-9=0 => x = 9

c) x(x+3) =0

=> TH1: x=0

=> TH2: x+3 =0 => x = -3

d) (x-2)(5-x)=0

=> TH1: x-2=0 => x=2

=> Th2: 5-x=0 => x=5