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anonymous

  • 5 years ago

How do I solve -4x+5y=0 3x+2y=23 by substitution?

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  1. Owlfred
    • 5 years ago
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  2. anonymous
    • 5 years ago
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    Is it necessary by substitution? U can multiply equation (-4x+5y=0) by 2 and the other equation by 5 and then substract the two. Or you can use equation(-4x+5y=0) and put y= 4x/5 and put it in the second equation

  3. anonymous
    • 5 years ago
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    Method 1: 1. Multiply Eqn 1 by 2 -8x+10y = 0 2. Multiply Eqn 2 by 5 15x + 10y = 115 3. Subtract these 2 equations - 23x = -115 x = 5 4. Substitute x = 5 in Eqn 1

  4. anonymous
    • 5 years ago
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    Thank You so much for your help. :)

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