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180 - 8t = 90 + 2t

-8t = -90 + 2t {subtracted 180 from both sides}

-10t = -90 {subtracted 2t from both sides}

t = 9 {divided both sides by -10}

12m + 7 = 3m + 52

12m = 3m + 45 {subtracted 7 from both sides}

9m = 45 {subtracted 3m from both sides}

m = 5 {divided both sides by 9}

Isolate the words with the x's so they're the two on a similar area of the equation and circulate the values devoid of the x to the different area. 14x - 12x = 8 + 31 carried out by subtracting 12x from the nicely suited area so 12x - 12x = 0 and subtracting 12x from the left area so as which you have 14x - 12x. in a similar way, I extra 31 to the two aspects so it zeroes out on the left and on the nicely suited you have 8 + 31. Then combine like words. 14x - 12x = 2x and eight + 31 =39 So the equation will become 2x = 39 Then divide the two aspects by two to isolate the x. x = 39/2 = 19.5

Here, I wrote it down and took a picture of each equation:

The first one

http://s60.photobucket.com/albums/h36/its_a_pookie...

The second

http://s60.photobucket.com/albums/h36/its_a_pookie...