1. if the value of the dependent variable is 20, find the value of the independent variable in the equation y = 5x + 10? ?
2. if the value of the independent variable is 30, find the value of the dependent variable in the equation y = 5x + 10? ?

X = independent variable
Y = dependent variable

1. y = 5x + 10   
  20 = 5x + 10   plug in
 -10         - 10    subtract like terms since 10 is positive
10/5= 5x/5         divide by 5, trying to get x by itself
    2 = x              5 divided by 5 cancels out and 10 divided by 5 is 2

y = 5(30) + 10
y = 150 + 10
y = 160