Pease help me due end of the day system by substitution plz show steps

Question

-3x-4y=2

6x+6y=-6

Answer 1

-6x - 8y = 4 after multiplying 1st equation by 2

6x +6y =-6 add them to eliminate one variable

-2y = -2 divide by -2

y = 1

6x+6y = -6

x+y = -1

x +1 = -1

x=-2

substitute 1 and -2 into the 1st equation

-3x -4y = 2 to get

6 -4 =2