Linear Equations
What is your job when solving a linear equation?
Isolate the variable
c + 5 = -5
c = -10
m - 20 = 1
m = 21
4a = 40
a = 10
3 = n/2
n = 6
How would you undo subtraction?
Addition
-8 = 4 + a
a = -12
-6 = f - 4
f = -2
-64 = 8y
y = -8
-7 = z/7
z = -49
How would you undo additon
Subtraction
43 = r + 30
r = 13
n - 11 = -8
n = 3
-24 = -6h
h =4
-11 = y/5
y = -55
How would you undo multiplication?
Division
-17 = 9 + y
y = -26
1 - n = 13
n = -12
4d = -52
d = -13
-27 = r/25
r = -675
How would you undo division?
Multiplication
-15 = -4 + n
n = -11
-36 = -18 - b
b = 18
-252 = 21k
k =-12
-15 = b/27
b = -405