Question

Please solve C) part

Answer 1

Answer:

x = - 3.84

Step-by-step explanation:

$\frac{0.4x - 3}{1.5x + 9} = \frac{ - 7}{5}$

By cross multiplication, we have

$5(0.4x - 3) = - 7(1.5x + 9)$

$or \: 2.0x - 15 = - 10.5x - 63$

$or \: 2.0x + 10.5x = 15 - 63$

$or \: 12.5x = - 48$

$or \: x = - \frac{48}{12.5} = - \frac{480}{125}$

$x = - \frac{96}{25} = - 3.84$

Answer 2

Answer:

Have a phenomenal future!

Step-by-step explanation:

$\frac{0.4x-3}{1.5x+9} =\frac{-7}{5}$

⇒-7(1.5x+9)=5(0.4x-3)

⇒-10.5x-63=2x-15

⇒-10.5x-2x=-15-63

⇒-12.5x=-78

⇒x=$\frac{-78}{-12.5}$

⇒x=6.24

Thank You