Задача 22753 ...

u176593622

22.01.2018

3x + 5 = -4x + 19;

⅓x - 1 = ¼ (x + ⅘).

SOVA

22.01.2018

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(1/3)х-1=(1/4)х+(1/4)*(4/5)
(1/3)х-1=(1/4)х+(1/5)
(1/3)х-(1/4)х=(1/5)+1
(4/12)х-(3/12)х=(1/5)+(5/5)
(1/12)х=(6/5)
х=(6/5):(1/12)
х=(6/5)*12
х=72/5
х=14,4