Answer is 48=5x + 18 equation
Solved X = 6
Step by step
Using y intercept form y=mx + b
Y is the total goal of 48 miles
M is rate, here it is 5 days
X is the unknown miles
B is the y intercept or set amount/starting point, which is the 18 already ridden
So
48 = 5x + 18
Solve
Subtract 18 from both sides to isolate X
48 -18 = 5x +18 - 18
30 = 5x
Divide both sides by 5 to solve for x
30/5 = 5/5 x
6 = x
Now we check our work
48 = 5x + 18
48 = (5) (6) + 18
48 = 30 + 18
48 = 48
Problem solved!