4r + y = 23
3x - y= 12

9514 1404 393

  (x, y) = (5, 3)

Step-by-step explanation:

We presume your two equations are ...

The coefficients of y are opposites, so we can add these equations to eliminate y:

  (4x +y) +(3x -y) = (23) +(12)

  7x = 35

  x = 5

Substituting into the second equation, we get ...

  3(5) -y = 12

  y = 15 -12 = 3

The solution is (x, y) = (5, 3).

a is the correct

logv3(x+2)=1

rewrite in exponential form:

logb(x) = y is equal to b^y =x

b = 3, y = 1

now solve for x:

3^1 = x+2)

x = 3-2

x = 1

see the picture for the graph.