How many solutions does -2 + 5p + 10 = 10 + 3p have?

Only 1 solution

Step-by-step explanation:

-2 + 5p + 10 = 10 + 3p

Subtract 10 from both sides:

-2 + 5p + 10 -10 = 10 + 3p- 10

Simplify:

-2+5p=3p

Add 2 to both sides:

-2+5p+2=3p+2

Subtract 3p from both sides:

5p-3p=3p+2-3p

simplify:

2p=2

Divide both sides by 2:

2p/2=2/2

Simplify:

p=1

7 and 4

Step-by-step explanation:

Let the number of hours Donnell practiced be d

and the number of hours Marcus practiced be m.

We can set up a system of equations.

d = m + 3

m + d = 11

Substitute the value of d that's in the first equation, into the second equation.

m + (m + 3) = 11

2m + 3 = 11

2m = 8

m = 4

Marcus practiced for 4 hours. Since Marcus and Donnell, together, practiced 11 hours, Donnell practiced for 11-4=7 hours.