Question

solve and check the results 2b+5/3b+4=3​

Answer 1

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$\large\mathtt{~~~~{\frac{2b+5}{3b+4}}=3}$

By cross multiplication, we get :

$\large\mathtt{~~~~2b+5=3(3b+4)}$

$\large\mathtt{→2b+5=9b+12}$

$\large\mathtt{→2b-9b=12-5}$

$\large\mathtt{→(-7b)=7}$

$\large\mathtt{→7b=(-7)}$

$\large\mathtt{→b={\frac{-7}{7}}}$

$\large\mathtt{→b={\underline{\underline{-1}}}}$

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Answer 2

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$\large{\frac{2b + 5}{3b + 4} = 3}$

$2b + 5 = 3(3b + 4)$

$2b + 5 = 9b + 12$

$2b - 9b = 12 - 5$

$- 7b = 7$

$b = - \frac{7}{7}$

$\bold{b = - 1}$