It is an equation and the value of x is 4
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4x + 7 = 6x -7 14=2x so x = 7 (plus a negative # is simply - that number)
16x+9 without the rest of the equation, what this equals, I can't solve
6x + 3 = 2x + 5 4x = 2 x=1/2
2x + 6 - 6x = 30= 6 - 4x = 30= -4x = 24= 4x = -24= x = -6
Add 12 to each side: 4x + 6x = 20 ie 10x = 20 so x = 2