Raka226 is correct, but here's a little more detail of the process:
2(2 - j) = 4 (j + 10)
Distribute the 2 over the 2-j and the 4 over the j + 10:
4 - 2j = 4j + 40
Add 2j to both sides
4 = 6j + 40
Subtract 40 from both sides:
-36 = 6j
Divide both sides by 6:
-6 = j
or just j = -6
.
j=-6 :)
j needs to be by its self on one side
2 is mulitpled by the answer to (2-j)
4 is mulitpled by the answer to (j+10)
Raka226 is correct, but here's a little more detail of the process:
2(2 - j) = 4 (j + 10)
Distribute the 2 over the 2-j and the 4 over the j + 10:
4 - 2j = 4j + 40
Add 2j to both sides
4 = 6j + 40
Subtract 40 from both sides:
-36 = 6j
Divide both sides by 6:
-6 = j
or just j = -6
.