5x-2(x-4)=9x+23 помогите)). Created by ilia20022. matematika-ru

5x-2(x-4)=9x+23 помогите))...

piksaeva85znayka 5х -2(х-4)= 9х+23
5х-2х+8=9х+23
3х - 9х = 23 -8
-6х= 15
х= - 15/6 = - 5/2
х= - 2 1/2 = -2,5

Проверим:
5 *(-2,5) - 2( -2,5-4) = 9 *(-2,5) +23
-12,5 - 2*(-6,5) = -22,5+23
-12,5 + 13 = 0,5
0,5=0,5

1 votes Thanks 5

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zhenyaM2002

Verified answer

5х-2(х-4)=9х+23
5х-2х+8=9х+23
5х-2х-9х=23-8
-6х=15
6х=-15
х=-15÷6
х=-2,5

1 votes Thanks 2

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