Question

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

Answer 1

Answer:

$\large\boxed{x=6}$

Step-by-step explanation:

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