-15+n= -9

m+4= -12

x-7=13

m-9= -13

1.) n = 6

2.) m = -16

3.) x = 20

4.) m = -4

Step-by-step explanation:

1.) -15 + n = -9

2.) m + 4 = -12

3.) x - 7 = 13

4.) m - 9 = -13

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correct answer is infinitely many solutions

step-by-step explanation:

2(2x + 3) = -4 + 2(2x + 5)

solving the above equation:

4x + 6 = -4 +4x +10

combining like terms

4x -4x = -4+10-6

0=0

since both sides are 0=0, we end up into true statement it means it has infinite many solutions.

so correct answer is infinitely many solutions