Answer:
n = -13
Step-by-step explanation:
√10 - 3n = 7 ⇔
⇔ 10 - 3n = 49 ⇔ We need to remove the square root. Ex: √n = 2 ⇔ n = 2²
⇔ -3n = 49 - 10 ⇔
⇔ -3n = 39 ⇔
⇔ n = [tex]\frac{39}{-3}[/tex] = -13 (as -3 changes members, as it was multiplying, it now divides, conversion).
