X= 3y
3x - 5y = 12
substitution

x = 9  y = 3  (9,3)

Step-by-step explanation:

3x - 5y = 12

3(3y) - 5y = 12

9y - 5y = 12

4y = 12

4y/4 = 12/4

y = 3

x = 3(3)

x = 9

CHECK:

3(9) - 5(3) = 12

27 - 15 = 12

12 = 12

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