How do you solve $9\leq 4x - 7$ ?

Question

1137 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-09-27T20:29:44

$x >= 4$

$9 <= 4x -7$
Flip the equation
$4x - 7>=9$
$4x >=9+7$
$4x>+16$
Divide both sides by $color(red)(4)$
$(4x)/color(red)(4) >= 16/color(red)(4)$
$x >= 4$

Answer 2 · 2017-09-27T20:31:08

$x>=4$

Add 7 to both sides

$16<=4x$

And divide through by 4

$4<=x$

How do you solve 9\leq 4x - 79\leq 4x - 7?