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drek231 [11]
2 years ago
5

C = 4x + 5y, the value of "x" when C = 51 & y = -3 is: =16.5 =9 =-16.5 =13

Mathematics
1 answer:
Oksi-84 [34.3K]2 years ago
6 0

Answer:

16.5

Step-by-step explanation:

Just put in the values of C and y first into the expression.

C = 4x + 5y

Put in values.

51 = 4x + 5(-3)

Evaluate.

51 = 4x + (-15)

Swap positions.

4x + (-15) = 51

Shift (-15) to the other side and change to (+15).

4x = 51 + 15

    = 66

Find x.

x = 66 ÷ 4

x = 16.5

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