Question

СРОЧНО СРОЧНО СРОЧНО​

Answer 1

1)

$\frac{a + 3b}{b} = 2$

$\frac{a}{b} + \frac{3b}{b} = 2$

$\frac{a}{b} + 3 = 2$

$\frac{a}{b} = 2 - 3 = - 1$

2)

$\frac{5a + 3b}{a} = \frac{5a}{a} + \frac{3b}{a} = 5 + 3 \: \frac{b}{a} = 5 + 3 \times (1 \div \frac{a}{b} ) = 5 + (1 \div ( - 1)) = 5 + ( - 1) = 5 - 1 = 4$