5x + 7 = 4
subtract 7 from both sides
5x = -3
divide both sides by 5
x = -3/5
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-4x +5x +4 =7 x + 4 = 7 x = 3
-7
8x - 4 = -7 + 5x8x - 5x - 4 = -7 + 5x - 5x subtract 5x from both sides3x - 4 + 4 = -7 + 4 add 4 to both sides3x = -3x = -3/3 = -1
(3, -4)
5x + 13