How do you solve $42 - 3 x = 12 - 8 x$ $42- 3x = 12- 8x$ ?

Question

1235 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-01-16T15:00:17

x = -6

$42 - 3 x = 12 - 8 x$ $42−3x=12−8x$

$42 - 12 = - 8 x + 3 x$ $42-12=−8x+3x$

$30 = - 5 x$ $30=−5x$

$x = - 6$ $x=-6$

Verification;
$42 - 3 (- 6) = 12 - 8 (- 6)$ $42−3(-6)=12−8(-6)$

$42 - (- 18) = 12 - (- 48)$ $42-(-18)=12−(-48)$

$60 = 60$ $60=60$

hence since LHS=RHS, x=-6! :)

-Sahar.

How do you solve 42−3x=12−8x42- 3x = 12- 8x?