Answer:
20
Step-by-step explanation:
Simplify both sides of the equation.
−4= r 20 −5 −4= 1 /20 r+−5 −4= 1 /20 r−5
Flip the equation.
1 /20 r−5=−4
Add 5 to both sides.
1 /20 r−5+5=−4+5
1 /20 r=1
Multiply both sides by 20.
20*( 1 /20 r)=(20)*(1)
r=20
