2x+4=8
2x=8-4 (you subtract 4 on both sides)
2x=4 (you then divide by 2 on both sides)
x=2
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4
(-2, 4)
5 - 2x = 8 x = -1 and 1/2 4x = 6 x = 6/4 or 3/2
3x + 4 = 8 + 2xSubtract 4 from each side:3x = 4 + 2xSubtract 2x from each side:x = 4
x=12