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valina [46]
3 years ago
14

Is 2 , -5 a solution to this system equation 2x + 5y = -19, 6y - 8x = -54 .? Justify your answer

Mathematics
1 answer:
Andreas93 [3]3 years ago
3 0
The easiest way to solve this problem is to put (2, -5) into both equations and see if it satisfies/works for both of them. 2 = x and -5 = y.

So for <span>2x + 5y = -19, 
</span><span>2(2) + 5(-5) = -19
4 - 25 = -19
-21 </span><span>≠ -19.

You can continue and try it out for </span><span>6y - 8x = -54 
6(-5) - 8(2) = -54
-30 - 16 = -54
-46</span> ≠ -54

But since (2, -5) already doesn't work for one equation, it cannot be a solution to the system of equations.
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