Question

if a/b=c/d=e/f=1/3 then 5a+3c+7e/5b+3d+7f​

Answer 1

Answer:

38.466

Step-by-step explanation:

according to the question,

$\frac{a}{b}$ = $\frac{c}{d}$ = $\frac{e}{f}$ = $\frac{1}{3}$

So, $a$, $c$ and $e$ = 1

and $b$, $d$ and $f$ = 3

Equation ⇒ 5$a$ + 3$a$ + 7$e$ ÷ 5$b$ + 3$d$ + 7$f$

= (5×1) + (3×1) + (7×1) ÷ (5×3) + (3×3) + (7×3)

According to VBODMAS rule,

• First solve brackets

(5×1) + (3×1) + (7×1) ÷ (5×3) + (3×3) + (7×3)

= 5 + 3 + 7 ÷ 15 + 9 + 21

• Then solve Division

7 ÷ 15 = $\frac{7}{15}$

• Then do addition

5 + 3 + $\frac{7}{15}$ + 9 + 21

= $\frac{75+45+7+135+315}{15}$ = $\frac{577}{15}$ = 38.466