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tuarahsinat
tuarahsinat tuarahsinat
  • 30-01-2016
  • Mathematics
Answered

79=(710)-(7*▲)

What is the value of ▲ in the equation?

Verified Answer :

mecca99
mecca99 mecca99
  • 30-01-2016

7x9= (7x10)-(7xa)
63=70-7a
-7=-7a
a(triangle)=1

Answer Link
apologiabiology
apologiabiology apologiabiology
  • 30-01-2016

can't type thta trignale thingie so subsitute with x
79=(710)-(7x)
we can multipily what we know
79=7 times 9=63

710=7 times 10=70
now we have
63=70-(7x)
add (7x) to both sides
(7x)+63=70
subtract 63 from boths ides
(7*x)=7
divide both sides by 7
x=1

the answe ris traignle is equal to 1

Answer Link

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