Can you rephrase the question? i dont really understand
You should do distributive property.
3(2x+1) If you multiply this out, you will get 6x+3.
A = 4(6x + 3)
A = 4(6x) + 4(3)
A = 24x + 12
The answer is 24x+12.
Subtract the 2 equations
7x+2y=-19
- -x+2y = 21
--------------------------
8x +0y=-2
x= -1/4