Question

1. to isolate ( j ) in ( kj - l = m ), which operation is used first?

a. division
b. subtraction
c. multiplication
d. addition

Explanation:

Step1: Isolate term with $j$

To undo subtraction of $l$, add $l$ to both sides:
$$kj - l + l = m + l$$
$$kj = m + l$$

Step2: Solve for $j$

Divide both sides by $k$:
$$j = \frac{m + l}{k}$$
The first operation is addition.

Answer:

d. Addition