1. c=-2
2. 0=12 no solution
3. x=4
4. r=3/2
Step-by-step explanation:
1) 9c-3c= -8-4
6c=-12
c=-12/6
c=-2
2) 3×5x-3×2-6x=3×3x+3×2
15x-6-6x=9x+6
15x-6x-8x=6-6
15x-14x=0
x=0
3)-x+7x=24
6x=24
x=24/6
x=4
4) -2r-1/2×-2=-2
-2r+1=-2
-2r=-2-1
-2r=-3
r=-3/-2
r=3/2
f
step-by-step explanation:
51-50