Question

use the method of substitution to solve the system of linear equation.
5a=2-b
5a=7-b

A. there is one solution, the solution is___
B. there are infinitely many solutions
C. there are no solutions.

Answer 1

You can just look at this and see that 5a cannot be equal to 2 - b and also 7 - b at the same time. Right?

Answer 2

Can you think of a b that works?
Or
7-b = 2-b
b = ?

Answer 3

I just learned how to do this

Answer 4

7-2=2-7?

Answer 5

Answer C.

Answer 6

yes