3x + 4 = 4x - 5
Add 5 to both sides: 3x + 9 = 4x
Subtract 3x from both sides: 9 = x
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(2, -1)
9x + 5 = 5x + 179x + 5 - 5x = 179x - 5x = 4x5-4x=1717-5=1212 divided by 4 = 3x=3
3x+56 = 2x+4 3x-2x = 4-56 x = -52
x=6