SOLVING EQUATIONS Module 1 Lesson 4
Addition equations – the inverse to addition is subtraction ■ X + 3 = -5
■ y+7=3
■
-3
■
X = -8
■
■
-3
-7
-7
y = -4
Subtraction equations – the inverse to subtraction is addition ■ m – 6 = 11
■ n – (-5) = -7
■
+6
■
m = 17
■
■
+6
+ (-5) +(-5) n = -12
Multiplication equation – the inverse to multiplication is division ■ ■ 7v
= -28
■ ■ -8w
■ =
■ =
■ v = -4
■
= -56
w=7
Division equation – the inverse of division is multiplication ■ ■
5
= -3
■ 4 = -3
■ -9 ■
■ ■
k = -45
■
f = -12
Distributive property – distribute the number being multiplied to every term inside the parenthesis ■ ■ 3(x
– 7)
■ ■ -5(y
+ 7)
■ 3x – 3
■ -5y + -5
■ 3x - 21
■ -5y - 35