Question

if 9-5x=12-(6x+7) evaluate x(second power)-3x-2

Answer 1

so one way to do this is to solve for x
1. 9 - 5x = 12 - (6x + 7)
2. 9 - 5x = 12 -6x - 7
3. 9 - 5x = 5 - 6x
4. 4 - 5x = -6x
5. 4 = -x
6. x = -4

Answer 2

so now that you have the value of x, you can stick it into your second equation

Answer 3

does that make sense?

Answer 4

oh ok so i had to solve that one part to evaluate the other part

Answer 5

right exactly

Answer 6

this is probably setting you up to learn how to do substitution problems, in which the last step is usually inserting the solution to one equation into the next

Answer 7

(subsituting)

Answer 8

k thanks sandra!