12j+21=9j

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Solution for 12j+21=9j equation:


12j+21=9j

We simplify the equation to the form, which is simple to understand 
12j+21=9j

We move all terms containing j to the left and all other terms to the right. 
+12j-9j=-21

We simplify left and right side of the equation. 
+3j=-21

We divide both sides of the equation by 3 to get j. 
j=-7

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