Question

Solve by substitution


7a = 2 - b
7a= 6 - b
a.no solution
b.infinite solutions
c. ordered pair:

Answer 1

7a = 2 - b
7a= 6 - b

b=2-7a

7a=6-2+7a
7a-7a=4
0=4

So, no solution.

Answer 2

OR
\[\large{2-b=6-b \quad \textbf{since {=7a}}}\]
\[\large{2-6=-b+b}\]
\[\large{-4\ne 0}\]

hence no soln

Answer 3

@aroub explained well though

Answer 4

got it @Jenny4218 ?