If 4x + 7 = 3... then x must equal -1
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4x + 7 = 6x -7 14=2x so x = 7 (plus a negative # is simply - that number)
It's an equation. Specifically, a linear equation in ' x '.Here's the solution for ' x ':4x + 7 = -3 - x5x + 7 = -35x = -10x = -2
4x - 7 = 5 + 7x x = -4
X=2
x + 5 + 3x - 7 + 9x + 3 - 4x Switch the like numbers closer to make the equation easier. x + 3x + 9x - 4x + 5 - 7 + 3 However this is an unsolvable as it isn't an equation. An equation needs an equals sign, for example: x + 3x + 9x - 4x + 5 - 7 + 3 = 0, or x + 3x + 9x - 4x + 5 - 7 + 3 = 10 If it is the former then the answer is 9x = -1 Thus x = -1/9