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If x = 7, what is the value of x + 20?

If 7x = 28, what is the value of 8x?

P=N(19-C)
The given equation relates the positive numbers P, N, and C. Which equation correctly expresses C in terms of P and N?

If 4x-28=-24, what is the value of x-7?

Which expression is equivalent to\( \left(8x^3+8\right)-\left(x^3-2\right) \) ?

If 6n = 12, what is the value of n + 4?

Which expression is equivalent to \( 5x^5-6x^4+8x^3 \) ？

The equation  x+y= 1,440 represents the number of minutes of daylight (between sunrise and sunset), x, and the number of minutes of non-daylight, y, on a particular day in Oak Park, Illinois. If this day has 670 minutes of daylight, how many minutes of non-daylight does it have?

7(2x-3)=63
Which equation has the same solution as the given equation?

c - 7 = 25p+k
The given equation relates the positive numbers c,  p, and k. Which equation correctly expresses c in terms of p and k?

(p+3)+8=10
What value of p is the solution to the given equation?

The equation 12t + b = c relates the variables t, b, and c. Which of the following correctly expresses the value of c - b in terms of t?