Question

estou de recuperaçao na escola e nao consigo resolver essa equaçao 4y-5-1,5y=(0,9-y)*(-3)

Answer 1

Resolvendo:

$\mathsf{4y-5-1,5y=\left(0,9-y\right)\cdot \left(-3\right)}\\\\\mathsf{4y-5-1,5y=\left(-3\cdot 0,9\right)-\left(-3y\right)}\\\\\mathsf{4y-5-1,5y=-2,7+3y}\\\\\mathsf{4y-1,5y-3y=-2,7+5}\\\\\mathsf{4y-1,5y-3y=2,3}\\\\\mathsf{4y-4,5y=2,3}\\\\\mathsf{-0,5y=2,3}\\\\\mathsf{y=-\dfrac{2,3}{0,5}}\\\\\\\mathsf{y=-\dfrac{23}{5}}\\\\\boxed{\mathsf{y=-4,6}}\: \: \checkmark$