SOLUTION: I Just dont get equasions i am just looking for an easier way to learn them than my teacher teaches me. 12-11a=45 18=-a+2 -8c+1=-3

Algebra ->  Equations -> SOLUTION: I Just dont get equasions i am just looking for an easier way to learn them than my teacher teaches me. 12-11a=45 18=-a+2 -8c+1=-3      Log On


   

Question 502226: I Just dont get equasions i am just looking for an easier way to learn them than my teacher teaches me.
12-11a=45
18=-a+2
-8c+1=-3
Answer by oberobic(2304) About Me  (Show Source):
You can put this solution on YOUR website!
12-11a=45
subtract 12 from both sides
12-12 -11a = 45-12
0 -11a = 33
-11a = 33
divide both sides by -11
-11a/-11 = 33/-11
-11/-11 = 1
-11a/-11= a
a = 33/-11
a = -3
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Check: 12-11(-3) = 12+33 = 45. OK.
.
18=-a+2
Subtract 2 from both sides
18-2 = a +2-2
16 = a
Equals are equal, so you can state:
a = 16
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Check: You can see that 16+2 = 18. OK.
.
-8c+1=-3
subtract 1 from both sides
-8c +1-1 = -3-1
-8c = -4
divide both sides by -8
-8c/-8 = -4/-8
c = 1/2
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Check: -8*1/2 = -4, so -4+1 = -3. OK.
.
Done.