Question

2x+3=-4x-9y
2x+8y=3-4x
can i solve this question with substitution method

Answer 1

2x+4x=-9y-3
2x+4x=-8y+3
- - = + -
0 = -y-6
6=-y
y=-6
m i going right

Answer 2

That's not the substitution method; that's subtraction. Because you solved them both to equal 2x+4x, you could substitute them by taking the right-hand sides of both of the equations and setting them equal to each other:\[-9y-3=-8y+3\]Then solve for y:\[9y=8y-6\]\[y=-6\]