Solve.

x + 4 = 10
a) x = 2
b) x = 3
c) x = 6
d) x = 14

The answer is x=6

Subtract 4 from both sides to isolate x

x=6

Step-by-step explanation:

x+4=10

  -4  -4

   x = 6

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,