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f) 100x (84-[87-(7xx-9): 2]}-10=2390​

Răspuns :

Răspuns:

Explicație pas cu pas:

100x (84-[87-(7xx-9): 2]}-10=2390​

100x (84-[87-(7xx-9): 2]}=2390​+10=2400

84-[87-(7xx-9): 2]}=2400:100=24

84-[87-(7xx-9): 2]=24

[87-(7xx-9): 2] =84-24=60

[87-(7xx-9): 2]=60

87-60=(7xx-9): 2

27*2=7*x-9

54+9=7x

63=7x

x=63/7=9