Solve the following equation:
a). y=7x + 4 b). y=6x + 14
y=9x - 6 2x - 9y =30

Question

Solve the following equation:
a). y=7x + 4                     b). y=6x + 14
     y=9x - 6                           2x - 9y =30

anonymous · Answer

Help!

bobbyleary · Answer

For a, since both functions are y = ..., this makes it easier to solve. You set both functions equal to each other.

7x + 4 = 9x - 6
Now solve for x.
10 = 2x
x = 5

Now double check it by subsituting x = 5 each equation.
y = 7(5) + 4 = 39
y = 9(5) - 6 = 39

The second one is one step harder, but give it a try. Post any issues you have and I will walk you through it.