Solve this system by ELIMINATION!9x-12y=15 -4x+4y=0
1 answer:
Answer:
x = -5
y = -5
Step-by-step explanation:
here's the solution :-
multiply equation (2) with 3
we get,
=》9x - 12y = 15
=》-12x + 12 y = 0
by adding the equations, :-
=》9x - 12y - 12 x + 12y = 15 + 0
=》-3x = 15
=》x = 15 ÷ -3
=》x = -5
putting the value of x as -5 in equation (2)
=》-4x + 4y = 0
=》( -4 × -5 ) + 4y = 0
=》20 + 4y = 0
=》4y = - 20
=》 y = -20 ÷ 4
=》y = -5
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