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$x+7=22$
$8x-6=6x+4$
$4x-3=3x+2$
$5\left(7-x\right)=31-x$
$5x=25$
$4\left(2-3x\right)=-2x-27$
Free fall is a special case of movement in a vertical direction and with constant acceleration, which is gravity. Gravity is always constant and downward. It is a type of non-uniform linear motion, but with a vertical trajectory.
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