Answer:
A. r - 5 = 8
Step-by-step explanation:
x = 4/5
2/5=1/2x
Step 1: Flip the equation.
1/2x=2/5
Step 2: Multiply both sides by 2.
2*(1/2x)=2*(2/5)x=4/5
75%
as a percent = 75%, or 0.75 in decimal form.
B
3b-10=20
3b-10+10=20+10
3b=30
3b/3=30/3
b=10