7n - 4 = 31
move -4 to the other side
sign changes from -4 to +4
7n-4+4= 31+4
7n= 31+4
7n= 35
divide both sides by 7 to get n by itself
7n/7= 35/7
cross out 7 and 7 , divide by 7 and then becomes 1*1*n= n
n= 35/7
answer:
n= 5
3.49 times I did the math and checks it so I'm right I believe
Answer:
r(5)=3.05 t(5)=15
Step-by-step explanation:
x=5
r(5)=(1.25)^5
r(5)=3.05
t(5)=3(5)
t(5)=15
