Answer:
A=6
Step-by-step explanation:
M=3A
M+6=2(A+6) M+6=2A+12 M=2A+6
System of equations:
M=3A Subtract
M=2A+6
0=A-6
A=6
Answer:
All real numbers
Step-by-step explanation:

Start by distributing -2 inside the parentheses.

Combine like terms on the right side of the equation.

Subtract 8 from both sides of the equation.

Divide both sides by -2 to isolate y.

This is a true statement, so there are infinite solutions.
Combine like terms
-6x^2+2y + -1 +2x^2 + -5y +3
( -6x^2+2x^2)+(2y-5y)+(-1+3)
= -4x^2+3y+2
Answer : C
I hope that's help !