Question

a+a+a=15 b+b+b=9 c+c+c=30 b*a-c=?

Answer 1

a+a+a = 15
Therefore a = 5.
b+b+b = 9
Therefore b = 3
c+c+c = 30
Therefore c = 10
So, b ×( a - c )
= 3 × (5 - 10)
= 15 - 30
= -15.
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Answer 2

a+a+a=15
=)3a=15
=)a=15/3
=)a=5

b+b+b=9
=)3b=9
=)b=9/3
=)b=3

c+c+c=30
=)3c=30
=)c=30/3
=)c=10

now we have:-
a=5
b=3
c=10

We have to find:-
b*a-c
=)b*(a-c)
=)3*(5-10)
=)3*-5
=)-15

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