Giúp em giúp em với ạ 6x+x=5¹¹:5⁹+3¹ 7x-x=5²¹:5¹⁹+3.2²-7⁰ x=85.7²-32.7²+53.51 (5x-9)³=216 (x-7)³+(7-4)²=134

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xin ctlhn nhoa :3

Đáp án:

6x+x=5¹¹:5⁹+3¹                                 

6x+1x=5¹¹:5⁹+3¹ 

7x=5²+ 3                             

7x=25+3

7x=28

  x=28:7

  x=4

7x-x=5²¹:5¹⁹+3.2²-7⁰

7x-1x=5²¹:5¹⁹+3.2²-7⁰

6x=5²+3.4-1

6x=25+3.4-1

6x=25+11

6x=36

x=36:6

x=6

x=85.7²-32.7²+53.51

x=7².(85-32)+53.51

x=14.53+53.51

x=53.(14+51)

x=53.65

x=3445

(5x-9)³=216

(5x-9)=6³

5x-9=6

5x=6+9

5x=15

x=15:5

x=3

(x-7)³+(7-4)²=134

(x-7)³ +3² =134

(x-7)³ +9=134

(x-7)³ =125

(x-7)³ =5³

x-7=5

x =5+7

x =12

 

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