Question

HELP!!

Solve the system using addition.
7 x plus 2 y
equals
negative 13
negative 7 x plus y
equals
25

Answer 1

y=4. x=-3

Explanation:

7x+2y=-13. add or minus each other

+ -7x+y=25

3y=12. solve it to get y=4( divide by 3 on both sides)

knowing that y is 4, solve one of the equations

-7x+4=25. -4 on both sides

-7x=21. divide by -7x on both sides

x=-3

therefore y=4 and X=-3