Answer:
10y^2-6
Step-by-step explanation:
2y^2=2(4y^2-3)
2x4y^2=8y^2
2x(-3)=(-6)
2y^2+8y^2-6
R = 12
L = 84
R + L =96
L = 7R
R = 1R
1 R + 7R = 8R
hope it helps,