Solve for x
x=1300
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3000+900=3x
Multiply 15 and 200 to get 3000. Multiply 2 and 450 to get 900.
3900=3x
Add 3000 and 900 to get 3900.
3x=3900
Swap sides so that all variable terms are on the left hand side.
x=\frac{3900}{3}
Divide both sides by 3.
x=1300
Divide 3900 by 3 to get 1300.
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