Posted by Tasha on Monday, March 2, 2009 at 7:28pm.
40=-0.2x+45
Subtract 45 to both sides
-5=-0.2x
now divide -0.2 to both sides
-5/-0.2=x
A negative divdes by a negative gives you a positive
5/0.2=x
You can leave that like that or find the decimal form of it.
40=-0.2x+45
0.2x = 45 - 40
0.2x = 5
x = 5/0.2
x = 25
Checking:
40 = -0.2x + 45
40 = -0.2 (25) + 45
40 = -5 + 45
Thank you sooo much!
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