5x + 17 = 7x - 123
123 + 17 = 7x - 5x
140 = 2x
x = 140 ÷ 2
x = 70
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Multiply the bottom equation by -1
If: x = 7 Then: y = (2*7)+3 = 17 And: 5x+y = (5*7)+17 = 52
3x = 24, x = 8
When 5x+3 = 17 then x = 2.8 Therefore when 8x-y = 3 then x = 2.8 and y = 19.4
9x + 5 = 5x + 179x + 5 - 5x = 179x - 5x = 4x5-4x=1717-5=1212 divided by 4 = 3x=3