Solve this system of equations

Make a substitution:

Then the system becomes

Simplifying the equations gives

which is to say,

Substituting this into the new system gives

Then

(meaning two solutions are (7, 13) and (-7, -13))

correct

step-by-step explanation:

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐