Solve for x
x=17
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4.2\times 5-x=100\times 0.04
Multiply both sides by 0.04.
21-x=100\times 0.04
Multiply 4.2 and 5 to get 21.
21-x=4
Multiply 100 and 0.04 to get 4.
-x=4-21
Subtract 21 from both sides.
-x=-17
Subtract 21 from 4 to get -17.
x=17
Multiply both sides by -1.
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