That’s the commutative property.
5.
3x - 1 = x + 9
Subtract x on both sides
2x - 1 = 9
Add one on both sides.
2x = 10
Divide by 2 to get the x.
x = 5
Hope this helps!
90 + (5x-2) + (2x+8) = 180
90 + 5x - 2 +2x + 8 = 180
7x + 96 = 180
7x = 180 - 96
7x = 84
x = 12
m<J = 5x - 2
m<J = 5(12) - 2
m<J = 60 - 2
m<J = 58
Find midpoint of segment.
(-1,1), (7,-5)

Find slope of line which passes through (-1,1) and (7,-5).

The slope of perpendicular line is negative reciprocal value of m.

Write quation of line which slope is

and passes throug the point (3,-2).
$5.15 - w = minimum wage in 1996
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