Marty's class collected $16.00 in a school-wide penny collection contest. if tommy's class collected, x, and then multiplied the difference by 2,they would have the same amount of money as marty's class. how much money did tommy's class collect?
a.$23.00
b.$13.00
c.$18.00
d.$5.00

A.$23.00

Step-by-step explanation:

This question is incomplete, please remember to be carful and submit the whole question :)

However, if we assume the money Tommy's class substracted from its penny collection is , we will have the following:

Marty's class collected in a school-wide penny collection contest. If Tommy's class collected,, then substracted   and then multiplied the difference by 2,they would have the same amount of money as Marty's class. How much money did Tommy's class collect?

This can be mathematically expressed as follows:

Isolating , which is the amount of money Tommy's class collected:

Hence, the correct option is A.

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions