Question

solve the following system of equation by substitution and elimination method 11x+7y=13 and 7x-11y=-13​

Answer 1

Answer:

Step-by-step explanation:

add both equations

11x+7y+7y-11x=13-13

7y+7y=0

14y=0

y=0

11x+7*0=13

11x+0=13

x=13/11

7x+11y=-13

7x+11*0=-13

7x=-13

x=-13/7