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I dont see any equations.
But to solve by the elimination method you have to make one variable eliminated. Ill show an example. Im not an expert so the varaible will probably not come out as whole numbers.
4x+6y=18
7x+y=24
To eliminated one o the variables multiply by the proper number to the whole equation. Multiply the bottom euqations by -6
4x+6y=18
-42x-6y=-144
Now add the equations top down...
-38x = -126
x = -126/-38
x = 3.315
Now solve for y by plugging x into one of the euqations.
4(3.315)+6y=18
y=0.2262
As I said before im not an expert and these answers are ugly. But this is how you do it. Make sure you take your time and dont make dumb mistakes like simple adding or subtracting mistakes.
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How do you decide whether to use elimination or subsitution to solve a three-variable system?
There is no simple answer. Sometimes, the nature of one of the equations lends itself to the substitution method but at other times, elimination is better. If they are non-linear equations, and there is an easy substitution then that is the best approach. With linear equations, using the inverse matrix is the fastest method.
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4
How do you solve 3 dimensional equations?
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