Question

Rozwiąż równanie 1. 2(3x+2)-3(5x-6)+4(7x+8)
2. (x-7)(x+3)-2(x+1(x-4)=-(x-1)(x+3)
Proszę na teraz dam naj

Answer 1

( x - 7 ) ( x + 3 ) - 2 ( x + 1 ) ( x - 4 ) = - ( x - 1 ) ( x + 3 )
+ 3x - 7x - 21 - 2 ( - 4x + x - 4 ) = + 3x - x - 3
+ 3x - 7x - 21 - + 8x - 2x + 8 = + 3 - 3
+ 2x - 13 =
+ 2x + = 13
2x = 13                      / : 2
x=6,5


2 ( 3x + 2 ) - 3 ( 5x - 6 ) + 4 ( 7x + 8 ) = 6x + 4 - 15x + 18 + 28x + 32
6x - 15x + 28x = 4 + 18 + 32
19x = 54          / : 19
x=