If you're adding them, that equals 12x
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It is a mathematical equation, usually written like this: 5x - 7 + 2x = 3x - 2 + 4x
5x-2x-3x+4x = (5-2-3+4)x = 4x
y= -4x-7 y=3x 3x= -4x-7 3x+4x=7 7x=7 x=1
5x + 20 = 4x +30 5x - 4x = 30 - 20 x = 10
True.3x^4 + 4x^3 - 3x^4 + 5x + 1= 4x^3 + 5x + 1