Hiya!
x is going to work out to 25.
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so first put the numbers into the equation you’ve been given.
pressure is 3, force is 1500 so 3=1500/area
then rearrange this equation so that you’re finding area.
area=1500/3
and 1500/3 gives you 500.
so 500 is the area.
area is length multiplied by width, so 20 multiplied by x.
total/width will give length, so 500/20 will give x.
500/20=25
so x is 25.
Assuming you want to simplify this expression, you would make use of the distributive property.
... = 3(4u) +3(-2) -2(u) -2(2)
... = 12u -6 -2u -4
... = u(12 -2) +(-6-4)
... = 10u -10
0.03b=j not sure if this is what you were looking for
In math the sum means to add