The common difference is the constant that you get when you get the difference between any term and the one preceding it. In this case:
(3--4)=(10-3)=(17-10)=d=7
7x + 3y = 30
-2x + 3y = 3....multiply by -1
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7x + 3y = 30
2x- 3y = -3 (result of multiplying by -1)
----------------add
9x = 27
x = 27/9
x = 3
7x + 3y = 30
7(3) + 3y = 30
21 + 3y = 30
3y = 30 - 21
3y = 9
y = 9/3
y = 3
solution is (3,3)
If youre trying to solve for the variables you have to solve for one of them in one equation first, so if you solved for x in 2x+3y=16 youd get x=8-(3/2)y. Then youd have to sub in that x for the x in the other equation so youd get 3(8-(3/2)y)-2y=13 then solve for y. Once you have the value of y it should be the same in both equations. Plug that new value of y into the equation of youre choosing then sove for x
Answer:
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Step-by-step explanation:
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Eight ounces =1 pound so 16 one ounce slices total
