9х+11=13х-1 2х+31=23х-1 2(х-2)-1=5(х-2)-7 у-20=-у 4(2х-6)=4х-4

Question

9х+11=13х-1
2х+31=23х-1
2(х-2)-1=5(х-2)-7
у-20=-у
4(2х-6)=4х-4

Answer 1

Решение на фотографии 

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