Solve for x
x=3
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220.5\times 2=\left(x+18\right)\times 21
Multiply both sides by 2.
441=\left(x+18\right)\times 21
Multiply 220.5 and 2 to get 441.
441=21x+378
Use the distributive property to multiply x+18 by 21.
21x+378=441
Swap sides so that all variable terms are on the left hand side.
21x=441-378
Subtract 378 from both sides.
21x=63
Subtract 378 from 441 to get 63.
x=\frac{63}{21}
Divide both sides by 21.
x=3
Divide 63 by 21 to get 3.
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