СРОЧНО 50 ДАЮ (х+1) : 7= 5 : 8
(2х - 3) :4=(х+3): 5
(х - 1): 2=5х:7
0,2(7 - 2у)= 2,3 - 0,3(у-6)
дам 50 главное обширно ответь
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