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How do I solve this please help!​

How do I solve this please help!​-example-1

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1 vote

Answer:

9 x + 8 y = 10 (I)

y = -4x + 7 (II)

One way is to rewrite the second as

4x + y = 7

Now multiply this equation by 8

32 x + 8 y = 56

9 x + 8 y = 10 and now subtract the equations

23 x = 46 this gives x as 2

From equation (II) y = -4 (2) + 7 = -1

So our values are (2, -1)

Check:

(I) 9 x + 8 y = 10 9 * 2 - 8 = 10

(II) 4 x + y = 7 or 4 * 2 - 1 = 7

Or you can substitute equation (II) directly into equation (I)

User Muhammad Ali Nazar
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