1 of 11

Algebra 1

Entry Problem: Write and solve an equation to find the unknown number.

  1. The sum of three times a number and 20 is 38.

​

  • The difference of seven times a number and 8 is -1.

​

  • Three less than the product of a number and 2 is 7.

2 of 11

  • The sum of three times a number and 20 is 38.

​

​

3 of 11

​

​

b. The difference of seven times a number and 8 is -1.

​

4 of 11

​

​

c. Three less than the product of a number and 2 is 7.

5 of 11

In a rectangle, the length is two more than three times the width.

The perimeter is 28 inches. Find the dimensions of the rectangle.

Length: _________ Width: _________

6 of 11

PROPORTIONS

What is a proportion?

You can tell if two fractions are proportional by using cross multiplication. Only equivalent fractions are proportional.

A proportion is a mathematical comparison between two numbers, often relating to equivalent fractions.

7 of 11

Solve the equation.

8 of 11

Solve the equation.

9 of 11

Solve the equation.

Leave answer as simplified fraction, not rounded decimal)

10 of 11

Solve the equation.

11 of 11

Solving Proportions

practice worksheet

​

​

(due tomorrow)

​

Check your answers and ask questions!