# Equations

by
**giuliaf2017**

Last updated 5 years ago

** Discipline: **

Math ** Subject: **

Number Operations
** Grade:**

7

Real Life Uses

One Step Equation

Equations

When you are at a store, you have to determine if you can save money by buying a mulitpack as opposed to a single unit. Real life: If a single unit is five dollars and a multipack is six for twenty-four dollars, which is a better value?c is cost per unit 6c=24--- --- = 46 6 c= $4The multipack is a better value compared to the single unit.

Two Step Equation

Step One: Isolate the variable by subtracting three from both sides of the equations. Step Two: Since 9x is multiplication, divide by nine on both sides of the equation to get x=2. X=2

Link

Step One: Since -7m is multiplication, you divide. You get m= -8.

Example 1

Video

Giulia Fornesi Math 724

25x-15=110+15 +15------------25x = 125----- ------ = 525 25 x=5

Example 2

Example 3

Written

Written

Since 25x -15 is subtraction, add to cancel out the fifteen. You are left with 25x = 125. Since 25x shows multiplication you divide by 25 on both sides of the equation. When you divide 125 by 25, you should be left with x equals five.

Two Step Equation

Written

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