1.1 Integrated math Grade 8

Which property of equality allows you to check a solution of an equation?

• Addition Property of Equality

• Subtraction Property of Equality I

• Multiplication Property of Equality

• Substitution Property of Equality

Solve the equation. Justify each step.

x + 5 = 8

Answer explanation

x = 3 Subtract 5 from both sides

Solve the equation. Justify each step.

n − 6 = −7

Answer explanation

n = -1 Add 6 to both sides

Solve the equation. Justify each step.

p ÷ 5 = 3

Answer explanation

p = 15 multiply by 5 both sides

Solve the equation. Justify each step.

−54 = 9s

Answer explanation

s = -6 divide by 9 on both sides

Solve the equation.

b − ⅗ = ⅚

Solve the equation.

b − ⅙ = ⅚

Answer explanation

b = 1

Solve the equation.

−108π = 6πj

Answer explanation

j = -18

ANALYZING RELATIONSHIPS

A baker orders 162 eggs. Each carton contains 18 eggs. Which equation can you use to find the number, x, of cartons?

• 162x = 18

• x/18 = 162

• 18x = 162

• x + 18 = 162