У-140=360:9, 320-х=200:10, у+80=70*6​

Question

У-140=360:9, 320-х=200:10, у+80=70*6​

Answer 1

1)

у-140=360:9

у-140=40

у=140+40

у=180

__________

180-140=360:9

40=40

2)

320-х=200:10

320-х=20

х=320-20

х=300

___________

320-300=200:10

20=20

3)

у+80=70*6

у+80=420

у=420-80

у=340

__________

340+80=70*6

420=420

Удачи))))