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You want to know the number of minute used. The equation $0.50 + $0.10m=$20.00, where m is the number of minutes on the card, represents this situation. Solve the equation and write a reason for each step if necessary, round your answer to the nearest hundredth.

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.10m+.50=20.00

-.50. - .50

___________

.10m=19.5

÷.10. ÷.10

_______

m=195

Hope this helps

User Ohnoplus
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