From the set {1, 2, 6}, use substitution to determine which value of x makes the equation true. 20 - 3x = 2

QAmmunity.org

My account
Edit my Profile
Private messages
My favorites

Ask a Question
Questions
Unanswered
Tags
Categories
Ask a Question

asked Jan 25, 2020 123k views

2 votes

From the set {1, 2, 6}, use substitution to determine which value of x makes the equation true. 20 - 3x = 2

Mathematics
high-school

Daria asked

by Daria

4.6k points

0 Comments

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

3 votes

Answer:

$\large\boxed{x=6}$

Explanation:

$\text{Put x = 1, x = 2 and x = 6 to the equation 20 - 3x = 2:}\\\\for\ x=1:\\\\L_s=20-3(1)=20-3=17\\R_s=2\\L_s\\eq R_s\\\boxed{NO}\\\\for\ x=2:\\\\L_s=20-3(2)=20-6=14\\R_s=2\\L_s\\eq R_s\\\boxed{NO}\\\\for\ x=6:\\\\L_s=20-3(6)=20-18=2\\R_s=2\\L_s=R_s\\\boxed{YES}$