A jeweler purchased 5 oz. of gold and 10 oz. of platinum for a total cost of $2375. In a second purchase at the same prices, the jeweler bought 8 oz. of gold and 7 oz. of
platinum for a cost of $2225. What is the cost per ounce of the gold and the platinum?

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

i got 86 for this

hope this !

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step-by-step :