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What is the value of a in the equation 5a – 10b = 45, when b = 3?

Sagot :

luana
[tex]5a-10b=45\ \ \ \ \ \ \ and\ \ \ \ \ \ b=3\\\\5a-10\cdot3=45\\5a-30=45\\5a=45+30\\5a=75\ \ \ \ \ \ \ ||:5\\\boxed{a=15}[/tex]
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