3. solve the given inequality and graph the solution on a number line.

-5x -25 > 30
Add 25 to both sides to get -5x by itself.
-5x > 55
Divide both sides by -5, and remember to flip the inequality when dividing/multiplying by a negative.

To show this on a number line, put an open dot at the left of the number line and draw the line going all the way to the left with the arrow pointing to the left. This shows that x is less than or equal to -11.
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AlexFray555

-x/2 + 3/2 + < 5/2 ==> multiply both sides by 2 ==> -x+3<5

-x<5-3==> -x<2 Multiply both sides by -x>-2 (When you multiply both sides by -1, the < become > & vice versa)  ===> x>-2
I'll try to draw the number line:

IIIII===II>∞
          -3      -2      -1       0     +1     +2     +3

So the equation is valid (where you have the double line) from a point SLIGHTLY greater the -2 & tends towards infinity

.Kim is x years old. Jordan is 7 years older than Kim. Four times Jordan’s age is equal to 200. (a)Write an equation that could be used to solve for Kim’s age, x. (b)How old is Kim? (c)How old is Jordan?

Kim = x
Jordan = x + 7

4(x+7) = 200
4x + 28 = 200
4x = 200 - 28
4x = 172
x = 172/4
x = 43. Kim's age

Jordan: x + 7 → 43+7 = 50