When 5x+3 = 17 then x = 2.8
Therefore when 8x-y = 3 then x = 2.8 and y = 19.4
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5x + 8xy + 10x + 3xy = 15x + 11xycombine like terms (the x's and the xy's)
Multiply the bottom equation by -1
If: x = 7 Then: y = (2*7)+3 = 17 And: 5x+y = (5*7)+17 = 52
5x + 17 = 7x - 123 123 + 17 = 7x - 5x 140 = 2x x = 140 ÷ 2 x = 70
3x = 24, x = 8