Question

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.
3x + 7y = 77
-2x + 7y = 42

Answer 1

1) Subtract both equations.
2) Solve for x.
3) When solved for x, then substitute the value of x in the equation and solve for y.

Answer 2

Wait!

Answer 3

you should explain how you got 35 :p coz it's plain wrong hehe

Answer 4

\(\Large \color{purple}{\rightarrow 5x = 35 }\)
\(\Large \color{purple}{\rightarrow x = 7 }\)

21 + 7y = 77
7y = 56
y = 8

Answer 5

what property is this

Answer 6

Solution (7,8)

Answer 7

thanks