Subtraction Property of Equality
a = b, then a - c = _____
b - c
if a = b, then a + c = __ + c
b
if a = b where c ≠ ___ , then a · c = b · c
0
3x + 5 = 20
x = 5
Give an example of equation
Nice
x + 10 = 34
x = 24
x - 17 = 10
x = 27
3x = 33
x = 11
2y − 7 = 15
y = 11
An equation is a mathematical statement that two expression are ____ in value.
equal
13 = n + 4
n = 9
2x + 11 = 15
x = 4
10 = p + 5
p = 5
To solve an equation means to find its _____.
Solution
y + 890 = 210
y = -680
t - 450 = 765
t = 1,215
4p - 55 = 75
p = 5
Yey
Write the four properties of equality
Addition Property of Equality (APE)
Subtraction Property of Equality (SPE)
Multiplication Property of Equality (MPE)
Division Property of Equality (DPE)
n + 314 = 700
n = 386
p - 110 = -55
p = 55
½x = 66
x = 132
4 (x−2) = 12
x = 5
We _____ the variable on one side of the equation
Isolate