m having some difficulty with substitution Method on these 4 problems
please show me how to do them!
10 points

y=-12x+387
x+-1/3y+30

y=8/9x+30
y=-4x-14

11x-3y=-24
x+2y/2=8

138= 138/11y + 828/187x
y=-2x-45

I'll pick one:

y=8/9x+30
y=-4x-14

-4x -14 = 8/9x +30

Can you do it? Try?