Solve for x
x=24
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800+400=50x
Multiply 20 and 40 to get 800.
1200=50x
Add 800 and 400 to get 1200.
50x=1200
Swap sides so that all variable terms are on the left hand side.
x=\frac{1200}{50}
Divide both sides by 50.
x=24
Divide 1200 by 50 to get 24.
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