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contestada

1) Eight less than triple a number

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2) The product of a number and fifteen decreased by six

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3) Lily has five more dollars than ½ the money that her brother has. Her brother has d dollars.

a. Write an expression that represents the amount of money Lily has.


b. If her brother has $4.50, how much money does Lily have?

Respuesta :

1) 3x-8 =x
subtract x from both sides
2x-8=0
add 8 to each side
2x=8
divide both sides by 2

x=4
1. 8-3x
2. X18-6
3. 5x1/2x

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