if 2a+b=8 and if b-c =5 what is the value of 10a+5c
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Step-by-step explanation:
2a+b = 8
Multiply this by 5 to get 10a which is required in the question
10a +5b = 40........(1)
b-c =5
Multiply this by -5 too since it is seen that coefficient of c is 5
-5b+5c = -25......(2)
Add (1) and (2)
10a+5c=15
There's your answer
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