120x+180 (x-3)=240 (x+3)

Question

120x+180 (x-3)=240 (x+3)

Answer 1

120x+180 (x-3)=240 (x+3)
120х+180х-540=240х+720
120х+180х-240х=720+540
60х=1260
х=1260:60
х=21
Ответ:21

Answer 2

120x+180(x-3)=240(x+3)
120x+180x-540=240x+720
120x+180x-240x=720+540
60x=1260
x=21

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