Question

Maths class 8 0.5y+5y/6 =21 +0.75y​

Answer 1

$Given \: simple \: equation :\\0.5y + \frac{5y}{6} = 21 + 0.75y$

/* Multiply each term by 6 , we get */

$\implies 6 \times 0.5y + 6\times \frac{5y}{6} = 6 \times 21 + 6 \times 0.75y$

$\implies 3y + 5y = 126 + 4.5y$

$\implies 8y = 126 + 4.5y$

/* Subtract bothsides by 4.5y , we get */

$\implies 8y - 4.5y = 126 + 4.5y - 4.5y$

$\implies 3.5y = 126$

/* Divide each term by 3.5, we get */

$\implies \frac{3.5y}{3.5} = \frac{126}{3.5}$

$\implies y = 36$

Therefore.,

$\red { Value \: of \: y } \green { = 36}$

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