Question

and i also need help to solve this one the last one please help!!!
solve by addition method
3x-2y=12
5x+2y=4

Answer 1

add first eq and second:
8x+ 0 =16
solve for x (divide both sides by 8):
x=2
substitute value of x in any given eq ( let say first one):
3*2-2y=12
subtract 6 to both sides of equation:
-2y=6
divide both sides by (-2):
y=-3
you solution:
x=2, y=-3

Answer 2

thank you angel