Question

verify the substitution that the root of (4x divide by 7) -12 = 0 is 21

Answer 1

Step-by-step explanation:

$\frac{4x}{7} - 12 = 0 \\ \frac{4x - 84}{7} = 0 \\ 4x = 84 \\ x = 21 \\ \\ \\ Verification. = > \\ \frac{4x}{7} - 12 = 0 \\ \frac{4(21)}{7} - 12 = 0 \\ \frac{84 - 84}{7} = 0 \\ 0 = 0 \\ Verified....$