Question

помогите плиз 7(2x-5)-(5(7x-2)-2(5x-7)=-72

Answer 1

7( 2х - 5 ) - ( 5( 7х - 2 ) - 2( 5х - 7 )) = - 72
14х - 35 - ( 35х - 10 - 10х + 14 ) = - 72
14х - 35 - ( 25х + 4 ) = - 72
14х - 35 - 25х - 4 = - 72
- 11х = - 72 + 39
Х = - 33 : ( - 11 )
Х = 3

Answer 2

$7(2x-5)-(5(7x-2)-2(5x-7))=-72\14x-35-(35x-10-10x+14)=-72\14x-25x-4=-72+35\-11x=-37+4\x=frac{-33}{-11}=3$