30=40-2q

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Solution for 30=40-2q equation:


30=40-2q

We simplify the equation to the form, which is simple to understand 
30=40-2q

We move all terms containing q to the left and all other terms to the right. 
+2q=+40-30

We simplify left and right side of the equation. 
+2q=+10

We divide both sides of the equation by 02 to get q. 
q=5

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