I am confused about this equation; 5x+2y=6, 7x+8y=-2 Does anyone think they can help me out?

I cannot solve it step-by-step because like I'm helping other people cuz I'm busy with my homework so just I'm going to direct you the question you're supposed to solve simultaneous equation by any method example elimination method substitution method then you get the answer if you get stuck you can inform me

(2,-2)

Step-by-step explanation:

Using elimination

7x+8y=-2

-20x-8y=-24

-13x=-26

x=2

7(2)+8y=-2

14+8y=-2

8y=-16

y=-2

(2,-2)

a4 - 3a2 - 1

step-by-step explanation:

step   1   :

equation at the end of step   1   :

  ((a4) -   3a2) -   1

step   2   :

trying to factor by splitting the middle term

2.1     factoring   a4-3a2-1  

the first term is,   a4   its coefficient is   1 .

the middle term is,   -3a2   its coefficient is   -3 .

the last term, "the constant", is   -1