63 · (80 – a) = 693(x + 420): 8 = 56​

Question

63 · (80 – a) = 693(x + 420): 8 = 56​

Answer 1

1)63×(80-а)=693

80-а=693:63

80-а=11

а=80-11

а=69

2)(x+420):8=56

x+420=56×8

x+420=448

x=448-420

x=28

:):):)

Answer 2

Ответ на фотке.........

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