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camdenmisiewic
For this problem, we can move all the X's to one side and all the regular numbers to the other. 

7x comes over and become -7x 

10 goes over and becomes -10.

5x+7x-7x=-3-10+13+12.

-3-10=-13, which cancels out the positive 13.

-7x+7x=0 which cancels each other out. 

Now, 5x=12

Divide each side by 5.

x=2.4  <--- final answer. 
cher
Hey there! :) 

5x + 10 + 7x = -3 + 13 + 7x + 12

Add like terms.

(5x + 7x) + 10 = (-3 + 13 + 12) + 7x

Simplify.

12x + 10 = 22 + 7x

Now, we have to isolate x. To do that, we must start out by subtracting 10 from both sides.

12x = 22 + 7x - 10

Then, subtract 7x from both sides.

12x - 7x = 22 - 10

Simplify.

5x = 12

Divide both sides by 5.

x = 12/5 OR as a decimal, x = 2.4

~Hope I helped!~
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