Null points

Calculate the roots of the equation:

3x+4+3x+5+2x+4=30


Correct result:

number of roots:  2
x1 =  -8.13
x2 =  -0.63

Solution:

 x(;5>3(x+4)3(x+5)2(x+4)=30x=8.125(;5> x(5;4>3(x+4)+3(x+5)2(x+4)=30x=17.5(5;4> x(4;+)3(x+4)+3(x+5)+2(x+4)=30x=0.625(4;+) P={8.125,0.625}



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