Solve for x
x=400
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300+2\times 450=3x
Multiply 1.5 and 200 to get 300.
300+900=3x
Multiply 2 and 450 to get 900.
1200=3x
Add 300 and 900 to get 1200.
3x=1200
Swap sides so that all variable terms are on the left hand side.
x=\frac{1200}{3}
Divide both sides by 3.
x=400
Divide 1200 by 3 to get 400.
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