Question

tìm x :

4x - 15 = - 75 - x 

72 - 3x = 5x + 8

giúp k nha

mk tk cho 

love m.n

Answer 1

4x - 15 = - 75 - x

=> 4x + x = - 75 + 15

=> 5x = - 60

=> x = - 12

vậy_

72 - 3x = 5x + 8

=> - 3x - 5x = 8 - 72

=> - 8x = - 64

=> x = 8

vậy_

Answer 2

\(4x-15=-75-x\)

\(\Leftrightarrow4x+x=-75+15\)

\(\Leftrightarrow5x=-60\Leftrightarrow x=-12\)