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Solve this equation using subtitution 8x subtract y equals 31 and 5x plus 3y equals 23?
Wiki User
∙ 13y ago
8x - y = 31 <=> y = 8x - 31.
5x + 3y = 23 => 5x + 3 * (8x - 31) = 23 <=> 5x + 24x - 93 = 23 <=> 29x = 23 + 93 <=> 29x = 116 <=> 29x/29 = 116/29 <=> x = 4.
y = 8x - 31 => y = 8 * 4 - 31 <=> y = 32 - 31 <=> y = 1.
Wiki User
∙ 13y ago
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1
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