Marty's class collected $17.80 in a school-wide penny collection contest. If Tommy's class added $3.90 to the amount they collected, x, and then multiplied the sum by 2, they would have the same amount of money as Marty's class.

2(x + $3.90)= $17.80

How much money did Tommy's class collect?
$5.00
$12.80
$3.90
$8.90

Question

Marty's class collected $17.80 in a school-wide penny collection contest. If Tommy's class added $3.90 to the amount they collected, x, and then multiplied the sum by 2, they would have the same amount of money as Marty's class.

2(x + $3.90)= $17.80

How much money did Tommy's class collect?
$5.00
$12.80
$3.90
$8.90

anonymous · Answer

x = 5.00 

5.00+3.90 = 8.90 
8.90 x 2 = 17.80

anonymous · Answer

i think 8.90 but not sure

texaschic101 · Answer

2(x + 3.90) = 17.80 --- divide both sides by 2
x + 3.90 = 17.80/2
x + 3.90 = 8.90 -- subtract 3.90 from both sides
x = 8.90 - 3.90
x = 5.00

texaschic101 · Answer

or you could distribute the 2 thru the parenthesis and work it out that way....but either way, you should get the same answer