Q: Solve for n: -700/n – (-5)(4) +1 = 121
A: Let’s first do some house keeping and multiply / combine numbers where we can:
-700/n – (-5)(4) +1 = 121
-700/n – (-20) +1 = 121
-700/n +20 +1 = 121
-700/n + 21 = 121
Now, subtract 21 from both sides:
-700/n = 100
Multiply both sides by n:
n*(-700/n) = 100 * n
-700*n/n = 100n
Notice the n’s on the left side cancel each other out to get:
-700 = 100n
Divide both sides by 100:
-700/100 = n
-7 = n