Download presentation

1
**Solving a system of equations by SUBSTITUTION**

Step 1: Solve an equation for one variable. Pick the easier equation. The goal is to get y= ; x= ; a= ; etc. Step 2: Substitute Put the equation solved in Step 1 into the other equation. Step 3: Solve the equation. Get the variable by itself. Step 4: Plug back in to find the other variable. Substitute the value of the variable into the equation. Step 5: Check your solution. Substitute your ordered pair into BOTH equations.

2
**1) Solve the system using substitution**

x + y = 5 y = 3 + x Step 1: Solve an equation for one variable. The second equation is already solved for y! Step 2: Substitute x + y = 5 x + (3 + x) = 5 2x + 3 = 5 2x = 2 x = 1 Step 3: Solve the equation.

3
**1) Solve the system using substitution**

x + y = 5 y = 3 + x x + y = 5 (1) + y = 5 y = 4 Step 4: Plug back in to find the other variable. (1, 4) (1) + (4) = 5 (4) = 3 + (1) Step 5: Check your solution. The solution is (1, 4). What do you think the answer would be if you graphed the two equations?

4
**Solve the system using substitution**

3x – y = 4 x = 4y - 17

5
**Solving a system of equations by SUBSTITUTION**

Pick the easier equation. The goal is to get y= ; x= ; a Step 1: Pick the easier equation. The goal is to get y= ; x= ; a= ; etc. . Put the equation solved in Step 1 into the other equation Using the equation solved in Step 1 replace the variable in the other equation. Therefore you have one equation with one variable. Step 2: he variable by itself. ck the easier equation. The goal is to get y= ; x= ; a= ; etc Step 3: Get the variable by itself. . Substitute the value of the variable into the equation. Write your answer as an ordered pair (x, y). Step 4:

6
REAL WORLD APP You buy a total of 50 burgers and hotdogs for $90. You pay $2 per burger and $1.50 per hotdog. Write a system of equations to find the number of x burgers and y hotdogs.

7
**Solve the system by substitution**

_______burgers and ______hotdogs

8
Try this: You sell lemonade for $2 per cup and orange juice for $3 per cup. You sell a total of 100 cups for $240. Write a system of equations to find the number of x cups of lemonade and y cups of orange juice.

9
**Solve the system by substitution**

_______cups lemonade & ______cups orange juice

Similar presentations

Presentation is loading. Please wait....

OK

Systems of Equations By Substitution and Elimination.

Systems of Equations By Substitution and Elimination.

© 2018 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google

Ppt on nuclear family and joint family system Opening ppt on ipad Ppt on suspension type insulators examples Ppt on overhead service connection Ppt on spiritual leadership theory Ppt on anti cancer therapy Ppt on south indian cuisine Electrical print reading ppt on ipad Ppt on transportation class 10 Ppt on solid dielectrics wiki