Question

Se 4x = 3 e 4y = 9, então (0,125)-4x+2y v? me ajudeeem por favor!

Answer 1

Considerando:

$\mathsf{4x=3}$

                 e

$\mathsf{4y=9}\\\\\mathsf{\dfrac{4y}{2}=\dfrac{9}{2}}\\\\\mathsf{2y=\dfrac{9}{2}}$
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Substituindo em:

$\mathsf{0,125-4x+2y}\\\\\\\mathsf{0,125-3+\dfrac{9}{2}}\\\\\\\mathsf{\dfrac{1}{8}-3+\dfrac{9}{2}}\\\\\\\mathsf{\dfrac{1}{8}-\dfrac{3\cdot 8}{8}+\dfrac{9\cdot 4}{2\cdot 4}}\\\\\\\mathsf{\dfrac{1-213/4+36}{8}}\\\\\\\boxed{\mathsf{\frac{13}{8}}}\: \: \checkmark$