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Solve the system of equations using elimination -3y - 4x = 15 and 9y+7x = 25

User Fuzz Evans
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1 Answer

5 votes

Answer:

y=41/3 and x = -14

Explanation:

system of the linear equation :

-3y-4x=15 eq[i]

9y+7x=25 eq[ii]

multiplying eq[i] by -7 and eq[ii] by 4,we get

21y+28x= -105 eq[iii]

36y+28x= 100 eq[iv]

subtracting eq[iii] from eq[iv],we get

15y=205

y=205/15=41/3

and x= -14

User Niklascp
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