Question

For which equation is c=7 the solution?
4c-15=-13
4c+15=13

Answer 1

Upon substituting c=7 into both given equations, neither results in a true statement. Hence, c=7 is not a solution to either of the equations listed.

Step-by-step explanation:

The student is asking which equation has c=7 as the solution. To determine which equation is correct, we can substitute c=7 into each one and see which one holds true.

For the first equation, 4c-15=-13, substituting c=7, we get:

• 4(7) - 15 = 28 - 15 = 13 ≠ -13

For the second equation, 4c+15=13, substituting c=7, we get:

• 4(7) + 15 = 28 + 15 = 43 ≠ 13

Unfortunately, neither equation has c=7 as a solution because when we substitute c=7, neither side of the equations equals the other. Therefore, c=7 is not the solution to either 4c-15=-13 or 4c+15=13.