Question

x+6+7=90

ai tick mk mk tick lại cho!

Answer 1

x+6+7=90

x+6=90+7

x+6=97

x=97-6

x=91

Vậy x = 91

Answer 2

x=77

ai k mk mk 

k alij cho !

Answer 3

\(x+6+7=90\)

\(x+6=90-7=83\)

\(x=83-6=77\)

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