-3x+4-x+2 simplifies to -4x+6. Since there are no more like terms, this cannot be simplified further. Also, since this is an expression, not an equation (no equals sign) you cannot solve for anything.
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x+7=3x+3 4=2x 4/2=2 x=2
3x = x + 4 x = 2 3x2=6 2+4=6
It is: 3x^2 +15x +12
Multiply out the factors and then you can check: (x + 2)(x + 3) = x² + 3x + 2x + 6 = x² + 5x + 6 ≠ x² + 3x + 4 Therefore False.
3x^2+3x-60=3(x^2+x+20)=3(x+5)(x-4)